diff --git a/Lib/locale.py b/Lib/locale.py
index f8d1d78..582a582 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -834,6 +834,47 @@
 #
 # SS 2014-10-01:
 # Updated alias mapping with glibc 2.19 supported locales.
+#
+# BP 2017-03-02
+# Updated alias mapping with glibc 2.24 supported locales. Prefer glibc locale
+# aliases to X11 ones.
+#
+#    updated 'az_az' -> 'az_AZ.ISO8859-9E' to 'az_AZ.UTF-8'
+#    updated 'ca_ad' -> 'ca_AD.ISO8859-1' to 'ca_AD.ISO8859-15'
+#    updated 'ca_fr' -> 'ca_FR.ISO8859-1' to 'ca_FR.ISO8859-15'
+#    updated 'ca_it' -> 'ca_IT.ISO8859-1' to 'ca_IT.ISO8859-15'
+#    updated 'cy_gb' -> 'cy_GB.ISO8859-1' to 'cy_GB.ISO8859-14'
+#    updated 'en_in' -> 'en_IN.ISO8859-1' to 'en_IN.UTF-8'
+#    updated 'eo' -> 'eo_XX.ISO8859-3' to 'eo.UTF-8'
+#    updated 'et_ee' -> 'et_EE.ISO8859-15' to 'et_EE.ISO8859-1'
+#    updated 'fi_fi' -> 'fi_FI.ISO8859-15' to 'fi_FI.ISO8859-1'
+#    updated 'gd_gb' -> 'gd_GB.ISO8859-1' to 'gd_GB.ISO8859-15'
+#    updated 'hi_in' -> 'hi_IN.ISCII-DEV' to 'hi_IN.UTF-8'
+#    updated 'iu_ca' -> 'iu_CA.NUNACOM-8' to 'iu_CA.UTF-8'
+#    updated 'ka_ge' -> 'ka_GE.GEORGIAN-ACADEMY' to 'ka_GE.GEORGIAN_PS'
+#    updated 'lo_la' -> 'lo_LA.MULELAO-1' to 'lo_LA.UTF-8'
+#    updated 'mi_nz' -> 'mi_NZ.ISO8859-1' to 'mi_NZ.ISO8859-13'
+#    updated 'nr_za' -> 'nr_ZA.ISO8859-1' to 'nr_ZA.UTF-8'
+#    updated 'nso_za' -> 'nso_ZA.ISO8859-15' to 'nso_ZA.UTF-8'
+#    updated 'ru_ru' -> 'ru_RU.UTF-8' to 'ru_RU.ISO8859-5'
+#    updated 'russian' -> 'ru_RU.ISO8859-5' to 'ru_RU.KOI8-R'
+#    updated 'rw_rw' -> 'rw_RW.ISO8859-1' to 'rw_RW.UTF-8'
+#    updated 'sq_al' -> 'sq_AL.ISO8859-2' to 'sq_AL.ISO8859-1'
+#    updated 'ss_za' -> 'ss_ZA.ISO8859-1' to 'ss_ZA.UTF-8'
+#    updated 'ta_in' -> 'ta_IN.TSCII-0' to 'ta_IN.UTF-8'
+#    updated 'tg_tj' -> 'tg_TJ.KOI8-C' to 'tg_TJ.KOI8-T'
+#    updated 'th_th' -> 'th_TH.ISO8859-11' to 'th_TH.TIS_620'
+#    updated 'tn_za' -> 'tn_ZA.ISO8859-15' to 'tn_ZA.UTF-8'
+#    updated 'ts_za' -> 'ts_ZA.ISO8859-1' to 'ts_ZA.UTF-8'
+#    updated 'tt_ru' -> 'tt_RU.TATAR-CYR' to 'tt_RU.UTF-8'
+#    updated 'ur_pk' -> 'ur_PK.CP1256' to 'ur_PK.UTF-8'
+#    updated 'uz_uz' -> 'uz_UZ.UTF-8' to 'uz_UZ.ISO8859-1'
+#    updated 'uz_uz@cyrillic' -> 'uz_UZ.UTF-8' to 'uz_UZ.UTF-8@cyrillic'
+#    updated 'vi_vn' -> 'vi_VN.TCVN' to 'vi_VN.UTF-8'
+#    updated 'zh_cn' -> 'zh_CN.gb2312' to 'zh_CN.GB2312'
+#    updated 'zh_tw' -> 'zh_TW.big5' to 'zh_TW.BIG5'
+#    updated 'zh_tw.euctw' -> 'zh_TW.eucTW' to 'zh_TW.EUC_TW'
+#
 
 locale_alias = {
     'a3':                                   'az_AZ.KOI8-C',
@@ -844,10 +885,12 @@
     'aa_et':                                'aa_ET.UTF-8',
     'af':                                   'af_ZA.ISO8859-1',
     'af_za':                                'af_ZA.ISO8859-1',
+    'ak_gh':                                'ak_GH.UTF-8',
     'am':                                   'am_ET.UTF-8',
     'am_et':                                'am_ET.UTF-8',
     'american':                             'en_US.ISO8859-1',
     'an_es':                                'an_ES.ISO8859-15',
+    'anp_in':                               'anp_IN.UTF-8',
     'ar':                                   'ar_AA.ISO8859-6',
     'ar_aa':                                'ar_AA.ISO8859-6',
     'ar_ae':                                'ar_AE.ISO8859-6',
@@ -865,6 +908,7 @@
     'ar_qa':                                'ar_QA.ISO8859-6',
     'ar_sa':                                'ar_SA.ISO8859-6',
     'ar_sd':                                'ar_SD.ISO8859-6',
+    'ar_ss':                                'ar_SS.UTF-8',
     'ar_sy':                                'ar_SY.ISO8859-6',
     'ar_tn':                                'ar_TN.ISO8859-6',
     'ar_ye':                                'ar_YE.ISO8859-6',
@@ -874,7 +918,7 @@
     'ast_es':                               'ast_ES.ISO8859-15',
     'ayc_pe':                               'ayc_PE.UTF-8',
     'az':                                   'az_AZ.ISO8859-9E',
-    'az_az':                                'az_AZ.ISO8859-9E',
+    'az_az':                                'az_AZ.UTF-8',
     'az_az.iso88599e':                      'az_AZ.ISO8859-9E',
     'be':                                   'be_BY.CP1251',
     'be@latin':                             'be_BY.UTF-8@latin',
@@ -886,6 +930,7 @@
     'ber_ma':                               'ber_MA.UTF-8',
     'bg':                                   'bg_BG.CP1251',
     'bg_bg':                                'bg_BG.CP1251',
+    'bhb_in.utf8':                          'bhb_IN.UTF-8',
     'bho_in':                               'bho_IN.UTF-8',
     'bn_bd':                                'bn_BD.UTF-8',
     'bn_in':                                'bn_IN.UTF-8',
@@ -893,6 +938,7 @@
     'bo_in':                                'bo_IN.UTF-8',
     'bokmal':                               'nb_NO.ISO8859-1',
     'bokm\xe5l':                            'nb_NO.ISO8859-1',
+    'bokm\xef\xbf\xbd':                     'nb_NO.ISO8859-1',
     'br':                                   'br_FR.ISO8859-1',
     'br_fr':                                'br_FR.ISO8859-1',
     'brx_in':                               'brx_IN.UTF-8',
@@ -909,15 +955,19 @@
     'c_c':                                  'C',
     'c_c.c':                                'C',
     'ca':                                   'ca_ES.ISO8859-1',
-    'ca_ad':                                'ca_AD.ISO8859-1',
+    'ca_ad':                                'ca_AD.ISO8859-15',
     'ca_es':                                'ca_ES.ISO8859-1',
     'ca_es@valencia':                       'ca_ES.ISO8859-15@valencia',
-    'ca_fr':                                'ca_FR.ISO8859-1',
-    'ca_it':                                'ca_IT.ISO8859-1',
+    'ca_fr':                                'ca_FR.ISO8859-15',
+    'ca_it':                                'ca_IT.ISO8859-15',
     'catalan':                              'ca_ES.ISO8859-1',
+    'ce_ru':                                'ce_RU.UTF-8',
     'cextend':                              'en_US.ISO8859-1',
     'chinese-s':                            'zh_CN.eucCN',
     'chinese-t':                            'zh_TW.eucTW',
+    'chr_us':                               'chr_US.UTF-8',
+    'ckb_iq':                               'ckb_IQ.UTF-8',
+    'cmn_tw':                               'cmn_TW.UTF-8',
     'crh_ua':                               'crh_UA.UTF-8',
     'croatian':                             'hr_HR.ISO8859-2',
     'cs':                                   'cs_CZ.ISO8859-2',
@@ -926,7 +976,7 @@
     'csb_pl':                               'csb_PL.UTF-8',
     'cv_ru':                                'cv_RU.UTF-8',
     'cy':                                   'cy_GB.ISO8859-1',
-    'cy_gb':                                'cy_GB.ISO8859-1',
+    'cy_gb':                                'cy_GB.ISO8859-14',
     'cz':                                   'cs_CZ.ISO8859-2',
     'cz_cz':                                'cs_CZ.ISO8859-2',
     'czech':                                'cs_CZ.ISO8859-2',
@@ -939,6 +989,7 @@
     'de_be':                                'de_BE.ISO8859-1',
     'de_ch':                                'de_CH.ISO8859-1',
     'de_de':                                'de_DE.ISO8859-1',
+    'de_it':                                'de_IT.ISO8859-1',
     'de_li.utf8':                           'de_LI.UTF-8',
     'de_lu':                                'de_LU.ISO8859-1',
     'deutsch':                              'de_DE.ISO8859-1',
@@ -965,7 +1016,8 @@
     'en_gb':                                'en_GB.ISO8859-1',
     'en_hk':                                'en_HK.ISO8859-1',
     'en_ie':                                'en_IE.ISO8859-1',
-    'en_in':                                'en_IN.ISO8859-1',
+    'en_il':                                'en_IL.UTF-8',
+    'en_in':                                'en_IN.UTF-8',
     'en_ng':                                'en_NG.UTF-8',
     'en_nz':                                'en_NZ.ISO8859-1',
     'en_ph':                                'en_PH.ISO8859-1',
@@ -976,15 +1028,14 @@
     'en_za':                                'en_ZA.ISO8859-1',
     'en_zm':                                'en_ZM.UTF-8',
     'en_zw':                                'en_ZW.ISO8859-1',
-    'en_zw.utf8':                           'en_ZS.UTF-8',
     'eng_gb':                               'en_GB.ISO8859-1',
     'english':                              'en_EN.ISO8859-1',
+    'english.iso88591':                     'en_US.ISO8859-1',
     'english_uk':                           'en_GB.ISO8859-1',
     'english_united-states':                'en_US.ISO8859-1',
     'english_united-states.437':            'C',
     'english_us':                           'en_US.ISO8859-1',
-    'eo':                                   'eo_XX.ISO8859-3',
-    'eo.utf8':                              'eo.UTF-8',
+    'eo':                                   'eo.UTF-8',
     'eo_eo':                                'eo_EO.ISO8859-3',
     'eo_us.utf8':                           'eo_US.UTF-8',
     'eo_xx':                                'eo_XX.ISO8859-3',
@@ -1012,7 +1063,7 @@
     'es_ve':                                'es_VE.ISO8859-1',
     'estonian':                             'et_EE.ISO8859-1',
     'et':                                   'et_EE.ISO8859-15',
-    'et_ee':                                'et_EE.ISO8859-15',
+    'et_ee':                                'et_EE.ISO8859-1',
     'eu':                                   'eu_ES.ISO8859-1',
     'eu_es':                                'eu_ES.ISO8859-1',
     'eu_fr':                                'eu_FR.ISO8859-1',
@@ -1021,7 +1072,7 @@
     'fa_ir.isiri3342':                      'fa_IR.ISIRI-3342',
     'ff_sn':                                'ff_SN.UTF-8',
     'fi':                                   'fi_FI.ISO8859-15',
-    'fi_fi':                                'fi_FI.ISO8859-15',
+    'fi_fi':                                'fi_FI.ISO8859-1',
     'fil_ph':                               'fil_PH.UTF-8',
     'finnish':                              'fi_FI.ISO8859-1',
     'fo':                                   'fo_FO.ISO8859-1',
@@ -1033,6 +1084,7 @@
     'fr_fr':                                'fr_FR.ISO8859-1',
     'fr_lu':                                'fr_LU.ISO8859-1',
     'fran\xe7ais':                          'fr_FR.ISO8859-1',
+    'fran\xef\xbf\xbdis':                   'fr_FR.ISO8859-1',
     'fre_fr':                               'fr_FR.ISO8859-1',
     'french':                               'fr_FR.ISO8859-1',
     'french.iso88591':                      'fr_CH.ISO8859-1',
@@ -1045,7 +1097,7 @@
     'galego':                               'gl_ES.ISO8859-1',
     'galician':                             'gl_ES.ISO8859-1',
     'gd':                                   'gd_GB.ISO8859-1',
-    'gd_gb':                                'gd_GB.ISO8859-1',
+    'gd_gb':                                'gd_GB.ISO8859-15',
     'ger_de':                               'de_DE.ISO8859-1',
     'german':                               'de_DE.ISO8859-1',
     'german.iso88591':                      'de_CH.ISO8859-1',
@@ -1059,11 +1111,12 @@
     'gv':                                   'gv_GB.ISO8859-1',
     'gv_gb':                                'gv_GB.ISO8859-1',
     'ha_ng':                                'ha_NG.UTF-8',
+    'hak_tw':                               'hak_TW.UTF-8',
     'he':                                   'he_IL.ISO8859-8',
     'he_il':                                'he_IL.ISO8859-8',
     'hebrew':                               'he_IL.ISO8859-8',
     'hi':                                   'hi_IN.ISCII-DEV',
-    'hi_in':                                'hi_IN.ISCII-DEV',
+    'hi_in':                                'hi_IN.UTF-8',
     'hi_in.isciidev':                       'hi_IN.ISCII-DEV',
     'hne':                                  'hne_IN.UTF-8',
     'hne_in':                               'hne_IN.UTF-8',
@@ -1099,7 +1152,7 @@
     'it_it':                                'it_IT.ISO8859-1',
     'italian':                              'it_IT.ISO8859-1',
     'iu':                                   'iu_CA.NUNACOM-8',
-    'iu_ca':                                'iu_CA.NUNACOM-8',
+    'iu_ca':                                'iu_CA.UTF-8',
     'iu_ca.nunacom8':                       'iu_CA.NUNACOM-8',
     'iw':                                   'he_IL.ISO8859-8',
     'iw_il':                                'he_IL.ISO8859-8',
@@ -1115,7 +1168,7 @@
     'japanese.euc':                         'ja_JP.eucJP',
     'jp_jp':                                'ja_JP.eucJP',
     'ka':                                   'ka_GE.GEORGIAN-ACADEMY',
-    'ka_ge':                                'ka_GE.GEORGIAN-ACADEMY',
+    'ka_ge':                                'ka_GE.GEORGIAN_PS',
     'ka_ge.georgianacademy':                'ka_GE.GEORGIAN-ACADEMY',
     'ka_ge.georgianps':                     'ka_GE.GEORGIAN-PS',
     'ka_ge.georgianrs':                     'ka_GE.GEORGIAN-ACADEMY',
@@ -1145,8 +1198,9 @@
     'li_nl':                                'li_NL.UTF-8',
     'lij_it':                               'lij_IT.UTF-8',
     'lithuanian':                           'lt_LT.ISO8859-13',
+    'ln_cd':                                'ln_CD.UTF-8',
     'lo':                                   'lo_LA.MULELAO-1',
-    'lo_la':                                'lo_LA.MULELAO-1',
+    'lo_la':                                'lo_LA.UTF-8',
     'lo_la.cp1133':                         'lo_LA.IBM-CP1133',
     'lo_la.ibmcp1133':                      'lo_LA.IBM-CP1133',
     'lo_la.mulelao1':                       'lo_LA.MULELAO-1',
@@ -1154,13 +1208,14 @@
     'lt_lt':                                'lt_LT.ISO8859-13',
     'lv':                                   'lv_LV.ISO8859-13',
     'lv_lv':                                'lv_LV.ISO8859-13',
+    'lzh_tw':                               'lzh_TW.UTF-8',
     'mag_in':                               'mag_IN.UTF-8',
     'mai':                                  'mai_IN.UTF-8',
     'mai_in':                               'mai_IN.UTF-8',
     'mg_mg':                                'mg_MG.ISO8859-15',
     'mhr_ru':                               'mhr_RU.UTF-8',
     'mi':                                   'mi_NZ.ISO8859-1',
-    'mi_nz':                                'mi_NZ.ISO8859-1',
+    'mi_nz':                                'mi_NZ.ISO8859-13',
     'mk':                                   'mk_MK.ISO8859-5',
     'mk_mk':                                'mk_MK.ISO8859-5',
     'ml':                                   'ml_IN.UTF-8',
@@ -1174,7 +1229,7 @@
     'mt':                                   'mt_MT.ISO8859-3',
     'mt_mt':                                'mt_MT.ISO8859-3',
     'my_mm':                                'my_MM.UTF-8',
-    'nan_tw@latin':                         'nan_TW.UTF-8@latin',
+    'nan_tw':                               'nan_TW.UTF-8',
     'nb':                                   'nb_NO.ISO8859-1',
     'nb_no':                                'nb_NO.ISO8859-1',
     'nds_de':                               'nds_DE.UTF-8',
@@ -1196,9 +1251,9 @@
     'no_no.iso88591@nynorsk':               'no_NO.ISO8859-1',
     'norwegian':                            'no_NO.ISO8859-1',
     'nr':                                   'nr_ZA.ISO8859-1',
-    'nr_za':                                'nr_ZA.ISO8859-1',
+    'nr_za':                                'nr_ZA.UTF-8',
     'nso':                                  'nso_ZA.ISO8859-15',
-    'nso_za':                               'nso_ZA.ISO8859-15',
+    'nso_za':                               'nso_ZA.UTF-8',
     'ny':                                   'ny_NO.ISO8859-1',
     'ny_no':                                'ny_NO.ISO8859-1',
     'nynorsk':                              'nn_NO.ISO8859-1',
@@ -1213,6 +1268,8 @@
     'pa_in':                                'pa_IN.UTF-8',
     'pa_pk':                                'pa_PK.UTF-8',
     'pap_an':                               'pap_AN.UTF-8',
+    'pap_aw':                               'pap_AW.UTF-8',
+    'pap_cw':                               'pap_CW.UTF-8',
     'pd':                                   'pd_US.ISO8859-1',
     'pd_de':                                'pd_DE.ISO8859-1',
     'pd_us':                                'pd_US.ISO8859-1',
@@ -1231,16 +1288,18 @@
     'pt':                                   'pt_PT.ISO8859-1',
     'pt_br':                                'pt_BR.ISO8859-1',
     'pt_pt':                                'pt_PT.ISO8859-1',
+    'quz_pe':                               'quz_PE.UTF-8',
+    'raj_in':                               'raj_IN.UTF-8',
     'ro':                                   'ro_RO.ISO8859-2',
     'ro_ro':                                'ro_RO.ISO8859-2',
     'romanian':                             'ro_RO.ISO8859-2',
     'ru':                                   'ru_RU.UTF-8',
-    'ru_ru':                                'ru_RU.UTF-8',
+    'ru_ru':                                'ru_RU.ISO8859-5',
     'ru_ua':                                'ru_UA.KOI8-U',
     'rumanian':                             'ro_RO.ISO8859-2',
-    'russian':                              'ru_RU.ISO8859-5',
+    'russian':                              'ru_RU.KOI8-R',
     'rw':                                   'rw_RW.ISO8859-1',
-    'rw_rw':                                'rw_RW.ISO8859-1',
+    'rw_rw':                                'rw_RW.UTF-8',
     'sa_in':                                'sa_IN.UTF-8',
     'sat_in':                               'sat_IN.UTF-8',
     'sc_it':                                'sc_IT.UTF-8',
@@ -1250,6 +1309,7 @@
     'sd_pk':                                'sd_PK.UTF-8',
     'se_no':                                'se_NO.UTF-8',
     'serbocroatian':                        'sr_RS.UTF-8@latin',
+    'sgs_lt':                               'sgs_LT.UTF-8',
     'sh':                                   'sr_RS.UTF-8@latin',
     'sh_ba.iso88592@bosnia':                'sr_CS.ISO8859-2',
     'sh_hr':                                'sh_HR.ISO8859-2',
@@ -1278,7 +1338,7 @@
     'spanish':                              'es_ES.ISO8859-1',
     'spanish_spain':                        'es_ES.ISO8859-1',
     'sq':                                   'sq_AL.ISO8859-2',
-    'sq_al':                                'sq_AL.ISO8859-2',
+    'sq_al':                                'sq_AL.ISO8859-1',
     'sq_mk':                                'sq_MK.UTF-8',
     'sr':                                   'sr_RS.UTF-8',
     'sr@cyrillic':                          'sr_RS.UTF-8',
@@ -1300,7 +1360,7 @@
     'sr_yu.utf8@cyrillic':                  'sr_RS.UTF-8',
     'sr_yu@cyrillic':                       'sr_RS.UTF-8',
     'ss':                                   'ss_ZA.ISO8859-1',
-    'ss_za':                                'ss_ZA.ISO8859-1',
+    'ss_za':                                'ss_ZA.UTF-8',
     'st':                                   'st_ZA.ISO8859-1',
     'st_za':                                'st_ZA.ISO8859-1',
     'sv':                                   'sv_SE.ISO8859-1',
@@ -1311,19 +1371,21 @@
     'swedish':                              'sv_SE.ISO8859-1',
     'szl_pl':                               'szl_PL.UTF-8',
     'ta':                                   'ta_IN.TSCII-0',
-    'ta_in':                                'ta_IN.TSCII-0',
+    'ta_in':                                'ta_IN.UTF-8',
     'ta_in.tscii':                          'ta_IN.TSCII-0',
     'ta_in.tscii0':                         'ta_IN.TSCII-0',
     'ta_lk':                                'ta_LK.UTF-8',
+    'tcy_in.utf8':                          'tcy_IN.UTF-8',
     'te':                                   'te_IN.UTF-8',
     'te_in':                                'te_IN.UTF-8',
     'tg':                                   'tg_TJ.KOI8-C',
-    'tg_tj':                                'tg_TJ.KOI8-C',
+    'tg_tj':                                'tg_TJ.KOI8-T',
     'th':                                   'th_TH.ISO8859-11',
-    'th_th':                                'th_TH.ISO8859-11',
+    'th_th':                                'th_TH.TIS_620',
     'th_th.tactis':                         'th_TH.TIS620',
     'th_th.tis620':                         'th_TH.TIS620',
     'thai':                                 'th_TH.ISO8859-11',
+    'the_np':                               'the_NP.UTF-8',
     'ti_er':                                'ti_ER.UTF-8',
     'ti_et':                                'ti_ET.UTF-8',
     'tig_er':                               'tig_ER.UTF-8',
@@ -1331,34 +1393,34 @@
     'tl':                                   'tl_PH.ISO8859-1',
     'tl_ph':                                'tl_PH.ISO8859-1',
     'tn':                                   'tn_ZA.ISO8859-15',
-    'tn_za':                                'tn_ZA.ISO8859-15',
+    'tn_za':                                'tn_ZA.UTF-8',
     'tr':                                   'tr_TR.ISO8859-9',
     'tr_cy':                                'tr_CY.ISO8859-9',
     'tr_tr':                                'tr_TR.ISO8859-9',
     'ts':                                   'ts_ZA.ISO8859-1',
-    'ts_za':                                'ts_ZA.ISO8859-1',
+    'ts_za':                                'ts_ZA.UTF-8',
     'tt':                                   'tt_RU.TATAR-CYR',
-    'tt_ru':                                'tt_RU.TATAR-CYR',
+    'tt_ru':                                'tt_RU.UTF-8',
     'tt_ru.tatarcyr':                       'tt_RU.TATAR-CYR',
-    'tt_ru@iqtelif':                        'tt_RU.UTF-8@iqtelif',
     'turkish':                              'tr_TR.ISO8859-9',
     'ug_cn':                                'ug_CN.UTF-8',
     'uk':                                   'uk_UA.KOI8-U',
     'uk_ua':                                'uk_UA.KOI8-U',
-    'univ':                                 'en_US.utf',
-    'universal':                            'en_US.utf',
+    'univ':                                 'en_US.UTF-8',
+    'universal':                            'en_US.UTF-8',
     'universal.utf8@ucs4':                  'en_US.UTF-8',
     'unm_us':                               'unm_US.UTF-8',
     'ur':                                   'ur_PK.CP1256',
     'ur_in':                                'ur_IN.UTF-8',
-    'ur_pk':                                'ur_PK.CP1256',
+    'ur_pk':                                'ur_PK.UTF-8',
     'uz':                                   'uz_UZ.UTF-8',
-    'uz_uz':                                'uz_UZ.UTF-8',
-    'uz_uz@cyrillic':                       'uz_UZ.UTF-8',
+    'uz_uz':                                'uz_UZ.ISO8859-1',
+    'uz_uz.utf8@cyrillic':                  'uz_UZ.UTF-8',
+    'uz_uz@cyrillic':                       'uz_UZ.UTF-8@cyrillic',
     've':                                   've_ZA.UTF-8',
     've_za':                                've_ZA.UTF-8',
     'vi':                                   'vi_VN.TCVN',
-    'vi_vn':                                'vi_VN.TCVN',
+    'vi_vn':                                'vi_VN.UTF-8',
     'vi_vn.tcvn':                           'vi_VN.TCVN',
     'vi_vn.tcvn5712':                       'vi_VN.TCVN',
     'vi_vn.viscii':                         'vi_VN.VISCII',
@@ -1375,16 +1437,18 @@
     'yo_ng':                                'yo_NG.UTF-8',
     'yue_hk':                               'yue_HK.UTF-8',
     'zh':                                   'zh_CN.eucCN',
-    'zh_cn':                                'zh_CN.gb2312',
+    'zh_cn':                                'zh_CN.GB2312',
     'zh_cn.big5':                           'zh_TW.big5',
     'zh_cn.euc':                            'zh_CN.eucCN',
+    'zh_cn.gb18030':                        'zh_CN.GB18030',
+    'zh_cn.gbk':                            'zh_CN.GBK',
     'zh_hk':                                'zh_HK.big5hkscs',
     'zh_hk.big5hk':                         'zh_HK.big5hkscs',
     'zh_sg':                                'zh_SG.GB2312',
     'zh_sg.gbk':                            'zh_SG.GBK',
-    'zh_tw':                                'zh_TW.big5',
+    'zh_tw':                                'zh_TW.BIG5',
     'zh_tw.euc':                            'zh_TW.eucTW',
-    'zh_tw.euctw':                          'zh_TW.eucTW',
+    'zh_tw.euctw':                          'zh_TW.EUC_TW',
     'zu':                                   'zu_ZA.ISO8859-1',
     'zu_za':                                'zu_ZA.ISO8859-1',
 }
diff --git a/Lib/test/test_locale.py b/Lib/test/test_locale.py
index 99fab58..2144819 100644
--- a/Lib/test/test_locale.py
+++ b/Lib/test/test_locale.py
@@ -449,7 +449,7 @@
         self.check('ko_kr.euckr', 'ko_KR.eucKR')
         self.check('zh_cn.euc', 'zh_CN.eucCN')
         self.check('zh_tw.euc', 'zh_TW.eucTW')
-        self.check('zh_tw.euctw', 'zh_TW.eucTW')
+        self.check('zh_tw.euctw', 'zh_TW.EUC_TW')
 
     def test_japanese(self):
         self.check('ja', 'ja_JP.eucJP')
@@ -475,6 +475,9 @@
         self.check('japanese.sjis', 'ja_JP.SJIS')
         self.check('jp_jp', 'ja_JP.eucJP')
 
+    def test_en_IN(self):
+        self.check('en_IN', 'en_IN.UTF-8')
+
 
 class TestMiscellaneous(unittest.TestCase):
     def test_getpreferredencoding(self):
diff --git a/Misc/NEWS b/Misc/NEWS
index fee8043..911bccb 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -19,6 +19,8 @@
 - bpo-29695: bool(), float(), list() and tuple() no longer take keyword arguments.
   The first argument of int() can now be passes only as positional argument.
 
+- bpo-20087: Prefer glibc's list of locale aliases to the X11 ones.
+
 - bpo-28893: Set correct __cause__ for errors about invalid awaitables
   returned from __aiter__ and __anext__.
 
diff --git a/Tools/i18n/makelocalealias.py b/Tools/i18n/makelocalealias.py
index c7ecace..7405e82 100755
--- a/Tools/i18n/makelocalealias.py
+++ b/Tools/i18n/makelocalealias.py
@@ -135,8 +135,8 @@
     args = parser.parse_args()
 
     data = locale.locale_alias.copy()
-    data.update(parse_glibc_supported(args.glibc_supported))
     data.update(parse(args.locale_alias))
+    data.update(parse_glibc_supported(args.glibc_supported))
     while True:
         # Repeat optimization while the size is decreased.
         n = len(data)