diff --git a/substore/rename.js b/substore/rename.js
index eca38c9..c463b6f 100644
--- a/substore/rename.js
+++ b/substore/rename.js
@@ -9,6 +9,10 @@ function operator(proxies) {
     const globalCount = Object.create(null);
     const currentCount = Object.create(null);
     const baseNames = new Array(proxies.length);
+    const normalizedCoreNames = new Array(proxies.length);
+    const subNames = new Array(proxies.length);
+    const sequenceInfos = new Array(proxies.length);
+    const sequenceGroups = Object.create(null);
     const suffixRegexCache = Object.create(null);
 
     const regionAliases = [
@@ -689,6 +693,42 @@ function operator(proxies) {
         .replace(/\s{2,}/g, ' ')
         .trim();
 
+    const regionSequenceOf = name => {
+        const sequenceMatch = name.match(/^((?:[\u{1F1E6}-\u{1F1FF}]{2}|🏴‍☠️)\s*)?([A-Z]{2}(?:\s+[A-Z]{3})?)(?:\s+(\d{2}))?(\s.*)?$/u);
+        if (!sequenceMatch) return null;
+
+        const prefix = sequenceMatch[1] || '';
+        const regionCode = sequenceMatch[2];
+        const sequenceNumber = sequenceMatch[3] || '';
+        const rest = sequenceMatch[4] || '';
+
+        return {
+            prefix,
+            regionCode,
+            sequenceNumber,
+            rest,
+            key: `${prefix}${regionCode}\u0000${rest.trim()}`
+        };
+    };
+
+    const withRegionSequence = (sequenceInfo, sequenceNumber) => {
+        return `${sequenceInfo.prefix}${sequenceInfo.regionCode} ${sequenceNumber}${sequenceInfo.rest}`
+            .replace(/\s{2,}/g, ' ')
+            .trim();
+    };
+
+    const nextRegionSequence = sequenceGroup => {
+        while (sequenceGroup.used[sequenceGroup.next.toString().padStart(2, '0')]) {
+            sequenceGroup.next += 1;
+        }
+
+        const sequenceNumber = sequenceGroup.next.toString().padStart(2, '0');
+        sequenceGroup.used[sequenceNumber] = true;
+        sequenceGroup.next += 1;
+
+        return sequenceNumber;
+    };
+
     const normalizeBilingualName = name => {
         const bilingualMatch = name.match(/^(.+?)\s*｜\s*(.+)$/);
         if (!bilingualMatch) return name;
@@ -763,7 +803,36 @@ function operator(proxies) {
         const subName = typeof proxy._subName === 'string' ? proxy._subName.trim() : '';
         const coreName = stripExistingSuffix(proxyName, subName);
         const normalizedCoreName = normalizeCoreName(coreName);
-        const baseName = subName ? `${normalizedCoreName} - ${subName}` : normalizedCoreName;
+        const sequenceInfo = regionSequenceOf(normalizedCoreName);
+
+        normalizedCoreNames[proxyIndex] = normalizedCoreName;
+        subNames[proxyIndex] = subName;
+        sequenceInfos[proxyIndex] = sequenceInfo;
+
+        if (sequenceInfo) {
+            const sequenceGroupKey = `${subName}\u0000${sequenceInfo.key}`;
+            const sequenceGroup = sequenceGroups[sequenceGroupKey] || (
+                sequenceGroups[sequenceGroupKey] = { used: Object.create(null), next: 1 }
+            );
+
+            if (sequenceInfo.sequenceNumber) {
+                sequenceGroup.used[sequenceInfo.sequenceNumber] = true;
+            }
+        }
+    });
+
+    normalizedCoreNames.forEach((normalizedCoreName, proxyIndex) => {
+        const subName = subNames[proxyIndex];
+        const sequenceInfo = sequenceInfos[proxyIndex];
+        const needsLeadingSequence = sequenceInfo && !sequenceInfo.sequenceNumber;
+        const sequenceGroupKey = sequenceInfo ? `${subName}\u0000${sequenceInfo.key}` : '';
+        const sequenceNumber = needsLeadingSequence
+            ? nextRegionSequence(sequenceGroups[sequenceGroupKey])
+            : '';
+        const coreName = needsLeadingSequence
+            ? withRegionSequence(sequenceInfo, sequenceNumber)
+            : normalizedCoreName;
+        const baseName = subName ? `${coreName} - ${subName}` : coreName;
 
         baseNames[proxyIndex] = baseName;
         globalCount[baseName] = (globalCount[baseName] || 0) + 1;