diff --git a/icu4c/source/test/cintltst/cloctst.c b/icu4c/source/test/cintltst/cloctst.c
index 8dbf04572daf..4e81eb17e4a2 100644
--- a/icu4c/source/test/cintltst/cloctst.c
+++ b/icu4c/source/test/cintltst/cloctst.c
@@ -4634,12 +4634,12 @@ const char* const full_data[][3] = {
     "bn_IN"
   }, {
     "und_CD",
-    "sw_Latn_CD",
-    "sw_CD"
+    "fr_Latn_CD",
+    "fr_CD"
   }, {
     "und_CF",
-    "fr_Latn_CF",
-    "fr_CF"
+    "sg_Latn_CF",
+    "sg"
   }, {
     "und_CG",
     "fr_Latn_CG",
@@ -4706,8 +4706,8 @@ const char* const full_data[][3] = {
     "de"
   }, {
     "und_DJ",
-    "aa_Latn_DJ",
-    "aa_DJ"
+    "fr_Latn_DJ",
+    "fr_DJ"
   }, {
     "und_DK",
     "da_Latn_DK",
@@ -5258,8 +5258,8 @@ const char* const full_data[][3] = {
     "it_SM"
   }, {
     "und_SN",
-    "fr_Latn_SN",
-    "fr_SN"
+    "wo_Latn_SN",
+    "wo"
   }, {
     "und_SO",
     "so_Latn_SO",
@@ -5286,8 +5286,8 @@ const char* const full_data[][3] = {
     "si"
   }, {
     "und_TD",
-    "fr_Latn_TD",
-    "fr_TD"
+    "ar_Arab_TD",
+    "ar_TD"
   }, {
     "und_TG",
     "fr_Latn_TG",
diff --git a/icu4c/source/test/cintltst/creststn.c b/icu4c/source/test/cintltst/creststn.c
index c500b99f5ea5..0038d0f8e4cb 100644
--- a/icu4c/source/test/cintltst/creststn.c
+++ b/icu4c/source/test/cintltst/creststn.c
@@ -2185,7 +2185,7 @@ static void TestFallback(void)
         UResourceBundle* myResB = ures_open(NULL,"no_NO_NY",&err);
         UResourceBundle* resLocID = ures_getByKey(myResB, "Version", NULL, &err);
         const UChar* version = NULL;
-        static const UChar versionStr[] = u"46"; // 46 in nn_NO or in a parent bundle/root
+        static const UChar versionStr[] = u"47"; // 47 in nn_NO or in a parent bundle/root
 
         if(U_FAILURE(err)) {
             log_data_err("Expected success when trying to test no_NO_NY aliased to nn_NO for Version "
diff --git a/icu4c/source/test/intltest/dtfmttst.cpp b/icu4c/source/test/intltest/dtfmttst.cpp
index 8476deb7d920..4da99586b525 100644
--- a/icu4c/source/test/intltest/dtfmttst.cpp
+++ b/icu4c/source/test/intltest/dtfmttst.cpp
@@ -2725,7 +2725,7 @@ void DateFormatTest::TestTimeZoneDisplayName()
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "z", "GMT+10", "+10:00" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "zzzz", "Australian Eastern Standard Time", "+10:00" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "v", "Sydney Time", "Australia/Sydney" },
-        { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "vvvv", "Eastern Australia Time", "Australia/Sydney" },
+        { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "vvvv", "Australian Eastern Time", "Australia/Sydney" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "VVVV", "Sydney Time", "Australia/Sydney" },
 
         { "en", "Australia/Sydney", "2004-01-15T00:00:00Z", "Z", "+1100", "+11:00" },
@@ -2737,7 +2737,7 @@ void DateFormatTest::TestTimeZoneDisplayName()
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "z", "GMT+10", "+10:00" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "zzzz", "Australian Eastern Standard Time", "+10:00" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "v", "Sydney Time", "Australia/Sydney" },
-        { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "vvvv", "Eastern Australia Time", "Australia/Sydney" },
+        { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "vvvv", "Australian Eastern Time", "Australia/Sydney" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "VVVV", "Sydney Time", "Australia/Sydney" },
 
         { "en", "Europe/London", "2004-01-15T00:00:00Z", "Z", "+0000", "+0:00" },
@@ -2778,7 +2778,7 @@ void DateFormatTest::TestTimeZoneDisplayName()
 
         // Proper CLDR primary zone support #9733
         { "en", "America/Santiago", "2013-01-01T00:00:00Z", "VVVV", "Chile Time", "America/Santiago" },
-        { "en", "Pacific/Easter", "2013-01-01T00:00:00Z", "VVVV", "Easter Time", "Pacific/Easter" },
+        { "en", "Pacific/Easter", "2013-01-01T00:00:00Z", "VVVV", "Easter Island Time", "Pacific/Easter" },
 
         // ==========
 
diff --git a/icu4c/source/test/intltest/loctest.cpp b/icu4c/source/test/intltest/loctest.cpp
index f3e16d3fa0dc..73f0bcb64887 100644
--- a/icu4c/source/test/intltest/loctest.cpp
+++ b/icu4c/source/test/intltest/loctest.cpp
@@ -2582,12 +2582,12 @@ LocaleTest::TestAddLikelyAndMinimizeSubtags() {
             "bn_IN"
         }, {
             "und_CD",
-            "sw_Latn_CD",
-            "sw_CD"
+            "fr_Latn_CD",
+            "fr_CD"
         }, {
             "und_CF",
-            "fr_Latn_CF",
-            "fr_CF"
+            "sg_Latn_CF",
+            "sg"
         }, {
             "und_CG",
             "fr_Latn_CG",
@@ -2650,8 +2650,8 @@ LocaleTest::TestAddLikelyAndMinimizeSubtags() {
             "de"
         }, {
             "und_DJ",
-            "aa_Latn_DJ",
-            "aa_DJ"
+            "fr_Latn_DJ",
+            "fr_DJ"
         }, {
             "und_DK",
             "da_Latn_DK",
@@ -3194,8 +3194,8 @@ LocaleTest::TestAddLikelyAndMinimizeSubtags() {
             "it_SM"
         }, {
             "und_SN",
-            "fr_Latn_SN",
-            "fr_SN"
+            "wo_Latn_SN",
+            "wo"
         }, {
             "und_SO",
             "so_Latn_SO",
@@ -3226,8 +3226,8 @@ LocaleTest::TestAddLikelyAndMinimizeSubtags() {
             "syr"
         }, {
             "und_TD",
-            "fr_Latn_TD",
-            "fr_TD"
+            "ar_Arab_TD",
+            "ar_TD"
         }, {
             "und_TG",
             "fr_Latn_TG",
diff --git a/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/format/DateFormatTest.java b/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/format/DateFormatTest.java
index 5bdf2faabfbc..b0cd3e47d934 100644
--- a/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/format/DateFormatTest.java
+++ b/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/format/DateFormatTest.java
@@ -943,7 +943,7 @@ public void TestTimeZoneInLocale() {
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "z", "GMT+10", "+10:00" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "zzzz", "Australian Eastern Standard Time", "+10:00" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "v", "Sydney Time", "Australia/Sydney" },
-        { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "vvvv", "Eastern Australia Time", "Australia/Sydney" },
+        { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "vvvv", "Australian Eastern Time", "Australia/Sydney" },
         { "en", "Australia/ACT", "2004-07-15T00:00:00Z", "VVVV", "Sydney Time", "Australia/Sydney" },
 
         { "en", "Australia/Sydney", "2004-01-15T00:00:00Z", "Z", "+1100", "+11:00" },
@@ -955,7 +955,7 @@ public void TestTimeZoneInLocale() {
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "z", "GMT+10", "+10:00" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "zzzz", "Australian Eastern Standard Time", "+10:00" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "v", "Sydney Time", "Australia/Sydney" },
-        { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "vvvv", "Eastern Australia Time", "Australia/Sydney" },
+        { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "vvvv", "Australian Eastern Time", "Australia/Sydney" },
         { "en", "Australia/Sydney", "2004-07-15T00:00:00Z", "VVVV", "Sydney Time", "Australia/Sydney" },
 
         { "en", "Europe/London", "2004-01-15T00:00:00Z", "Z", "+0000", "+0:00" },
@@ -996,7 +996,7 @@ public void TestTimeZoneInLocale() {
 
         // Proper CLDR primary zone support #9733
         { "en", "America/Santiago", "2013-01-01T00:00:00Z", "VVVV", "Chile Time", "America/Santiago" },
-        { "en", "Pacific/Easter", "2013-01-01T00:00:00Z", "VVVV", "Easter Time", "Pacific/Easter" },
+        { "en", "Pacific/Easter", "2013-01-01T00:00:00Z", "VVVV", "Easter Island Time", "Pacific/Easter" },
 
         // ==========
 
diff --git a/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/util/ULocaleTest.java b/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/util/ULocaleTest.java
index 084cd93d0665..15497f007acc 100644
--- a/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/util/ULocaleTest.java
+++ b/icu4j/main/common_tests/src/test/java/com/ibm/icu/dev/test/util/ULocaleTest.java
@@ -2725,12 +2725,12 @@ else if (!res.toString().equals(exp)) {
                     "bn_IN"
                 }, {
                     "und_CD",
-                    "sw_Latn_CD",
-                    "sw_CD"
+                    "fr_Latn_CD",
+                    "fr_CD"
                 }, {
                     "und_CF",
-                    "fr_Latn_CF",
-                    "fr_CF"
+                    "sg_Latn_CF",
+                    "sg"
                 }, {
                     "und_CG",
                     "fr_Latn_CG",
@@ -2793,8 +2793,8 @@ else if (!res.toString().equals(exp)) {
                     "de"
                 }, {
                     "und_DJ",
-                    "aa_Latn_DJ",
-                    "aa_DJ"
+                    "fr_Latn_DJ",
+                    "fr_DJ"
                 }, {
                     "und_DK",
                     "da_Latn_DK",
@@ -3337,8 +3337,8 @@ else if (!res.toString().equals(exp)) {
                     "it_SM"
                 }, {
                     "und_SN",
-                    "fr_Latn_SN",
-                    "fr_SN"
+                    "wo_Latn_SN",
+                    "wo"
                 }, {
                     "und_SO",
                     "so_Latn_SO",
@@ -3369,8 +3369,8 @@ else if (!res.toString().equals(exp)) {
                     "syr"
                 }, {
                     "und_TD",
-                    "fr_Latn_TD",
-                    "fr_TD"
+                    "ar_Arab_TD",
+                    "ar_TD"
                 }, {
                     "und_TG",
                     "fr_Latn_TG",
diff --git a/icu4j/main/core/src/main/java/com/ibm/icu/impl/LocaleFallbackData.java b/icu4j/main/core/src/main/java/com/ibm/icu/impl/LocaleFallbackData.java
index 7686eb131adf..608c13e474ae 100644
--- a/icu4j/main/core/src/main/java/com/ibm/icu/impl/LocaleFallbackData.java
+++ b/icu4j/main/core/src/main/java/com/ibm/icu/impl/LocaleFallbackData.java
@@ -332,6 +332,7 @@ private static Map<String, String> buildDefaultScriptTable() {
         t.put("ha_SD", "Arab");
         t.put("hac", "Arab");
         t.put("hak", "Hans");
+        t.put("hak_TW", "Hant");
         t.put("har", "Ethi");
         t.put("haz", "Arab");
         t.put("hbo", "Hebr");
@@ -553,6 +554,7 @@ private static Map<String, String> buildDefaultScriptTable() {
         t.put("lwm", "Thai");
         t.put("lya", "Tibt");
         t.put("lzh", "Hans");
+        t.put("lzz_GE", "Geor");
         t.put("mag", "Deva");
         t.put("mai", "Deva");
         t.put("man_GN", "Nkoo");
@@ -616,6 +618,7 @@ private static Map<String, String> buildDefaultScriptTable() {
         t.put("myz", "Mand");
         t.put("mzn", "Arab");
         t.put("nan", "Hans");
+        t.put("nan_TW", "Hant");
         t.put("nao", "Deva");
         t.put("ncd", "Deva");
         t.put("ncq", "Laoo");
@@ -723,6 +726,7 @@ private static Map<String, String> buildDefaultScriptTable() {
         t.put("pll", "Mymr");
         t.put("pmh", "Brah");
         t.put("pnt", "Grek");
+        t.put("pnt_RU", "Cyrl");
         t.put("pra", "Khar");
         t.put("prc", "Arab");
         t.put("prd", "Arab");
@@ -787,7 +791,6 @@ private static Map<String, String> buildDefaultScriptTable() {
         t.put("sds", "Arab");
         t.put("sel", "Cyrl");
         t.put("sfm", "Plrd");
-        t.put("sga", "Ogam");
         t.put("sgh", "Cyrl");
         t.put("sgj", "Deva");
         t.put("sgr", "Arab");
@@ -1098,30 +1101,36 @@ private static Map<String, String> buildParentLocaleTable() {
         t.put("en_CM", "en_001");
         t.put("en_CX", "en_001");
         t.put("en_CY", "en_001");
+        t.put("en_CZ", "en_150");
         t.put("en_DE", "en_150");
         t.put("en_DG", "en_001");
         t.put("en_DK", "en_150");
         t.put("en_DM", "en_001");
         t.put("en_Dsrt", "root");
         t.put("en_ER", "en_001");
+        t.put("en_ES", "en_150");
         t.put("en_FI", "en_150");
         t.put("en_FJ", "en_001");
         t.put("en_FK", "en_001");
         t.put("en_FM", "en_001");
+        t.put("en_FR", "en_150");
         t.put("en_GB", "en_001");
         t.put("en_GD", "en_001");
         t.put("en_GG", "en_001");
         t.put("en_GH", "en_001");
         t.put("en_GI", "en_001");
         t.put("en_GM", "en_001");
+        t.put("en_GS", "en_001");
         t.put("en_GY", "en_001");
         t.put("en_HK", "en_001");
+        t.put("en_HU", "en_150");
         t.put("en_ID", "en_001");
         t.put("en_IE", "en_001");
         t.put("en_IL", "en_001");
         t.put("en_IM", "en_001");
         t.put("en_IN", "en_001");
         t.put("en_IO", "en_001");
+        t.put("en_IT", "en_150");
         t.put("en_JE", "en_001");
         t.put("en_JM", "en_001");
         t.put("en_KE", "en_001");
@@ -1143,13 +1152,16 @@ private static Map<String, String> buildParentLocaleTable() {
         t.put("en_NF", "en_001");
         t.put("en_NG", "en_001");
         t.put("en_NL", "en_150");
+        t.put("en_NO", "en_150");
         t.put("en_NR", "en_001");
         t.put("en_NU", "en_001");
         t.put("en_NZ", "en_001");
         t.put("en_PG", "en_001");
         t.put("en_PK", "en_001");
         t.put("en_PN", "en_001");
+        t.put("en_PT", "en_150");
         t.put("en_PW", "en_001");
+        t.put("en_RO", "en_150");
         t.put("en_RW", "en_001");
         t.put("en_SB", "en_001");
         t.put("en_SC", "en_001");
@@ -1158,6 +1170,7 @@ private static Map<String, String> buildParentLocaleTable() {
         t.put("en_SG", "en_001");
         t.put("en_SH", "en_001");
         t.put("en_SI", "en_150");
+        t.put("en_SK", "en_150");
         t.put("en_SL", "en_001");
         t.put("en_SS", "en_001");
         t.put("en_SX", "en_001");
diff --git a/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/LocaleMatcherTest.java b/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
index aa8a7203dcd5..58e0c9650ad1 100644
--- a/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
+++ b/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/LocaleMatcherTest.java
@@ -570,7 +570,7 @@ private void check2(Set<ULocale> sorted) {
     public void testAsymmetry() {
         LocaleMatcher matcher;
         matcher = new LocaleMatcher("mul, nl");
-        assertEquals("nl", matcher.getBestMatch("af").toString()); // af => nl
+        assertEquals("mul", matcher.getBestMatch("af").toString()); // af => nl
 
         matcher = new LocaleMatcher("mul, af");
         assertEquals("mul", matcher.getBestMatch("nl").toString()); // but nl !=> af
diff --git a/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/TestLocaleValidity.java b/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/TestLocaleValidity.java
index 5d8ae0f0e66a..a9777dd7ef47 100644
--- a/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/TestLocaleValidity.java
+++ b/icu4j/main/core/src/test/java/com/ibm/icu/dev/test/util/TestLocaleValidity.java
@@ -56,7 +56,7 @@ public void testBasic() {
                 {"OK", "en-u-ca-buddhist"},
                 {"OK", "en-u-ca-islamic-umalqura"}, // additive
                 {"OK", "en-u-cf-account"},
-                {"OK", "en-u-co-big5han"},
+                {"{u, co-big5han}", "en-u-co-big5han"}, // deprecated in 47
                 {"OK", "en-u-cu-adp"},
                 {"OK", "en-u-fw-fri"},
                 {"OK", "en-u-dx-thai"},
@@ -106,7 +106,7 @@ public void testBasic() {
 
                 // really long case
 
-                {"OK", "en-u-ca-buddhist-ca-islamic-umalqura-cf-account-co-big5han-cu-adp-fw-fri-hc-h11-ka-noignore-kb-false-kc-false-kf-false-kk-false-kn-false-kr-latn-digit-symbol-ks-identic-kv-currency-nu-ahom-sd-usny-tz-adalv-va-posix"},
+                {"OK", "en-u-ca-buddhist-ca-islamic-umalqura-cf-account-co-pinyin-cu-adp-fw-fri-hc-h11-ka-noignore-kb-false-kc-false-kf-false-kk-false-kn-false-kr-latn-digit-symbol-ks-identic-kv-currency-nu-ahom-sd-usny-tz-adalv-va-posix"},
 
                 // root is canonicalized to the root locale (ICU-20273)
                 {"OK", "root"},