diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Swift3Codegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Swift3Codegen.java
index 248bfb24098..6a2ccf176a1 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Swift3Codegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Swift3Codegen.java
@@ -521,6 +521,15 @@ public class Swift3Codegen extends DefaultCodegen implements CodegenConfig {
             return "empty";
         }
 
+        Pattern startWithNumberPattern = Pattern.compile("^\\d+");
+        Matcher startWithNumberMatcher = startWithNumberPattern.matcher(name);
+        if (startWithNumberMatcher.find()) {
+            String startingNumbers = startWithNumberMatcher.group(0);
+            String nameWithoutStartingNumbers = name.substring(startingNumbers.length());
+
+            return "_" + startingNumbers + camelize(nameWithoutStartingNumbers, true);
+        }
+
         // for symbol, e.g. $, #
         if (getSymbolName(name) != null) {
             return camelize(WordUtils.capitalizeFully(getSymbolName(name).toUpperCase()), true);
diff --git a/modules/swagger-codegen/src/test/java/io/swagger/codegen/swift3/Swift3CodegenTest.java b/modules/swagger-codegen/src/test/java/io/swagger/codegen/swift3/Swift3CodegenTest.java
index 6fd6afa66f2..09c86e28bbd 100644
--- a/modules/swagger-codegen/src/test/java/io/swagger/codegen/swift3/Swift3CodegenTest.java
+++ b/modules/swagger-codegen/src/test/java/io/swagger/codegen/swift3/Swift3CodegenTest.java
@@ -63,6 +63,13 @@ public class Swift3CodegenTest {
         Assert.assertEquals(swiftCodegen.toEnumVarName("entry_name", null), "entryName");
     }
 
+    @Test
+    public void testStartingWithNumber() throws Exception {
+        Assert.assertEquals(swiftCodegen.toEnumVarName("123EntryName", null), "_123entryName");
+        Assert.assertEquals(swiftCodegen.toEnumVarName("123Entry_name", null), "_123entryName");
+        Assert.assertEquals(swiftCodegen.toEnumVarName("123EntryName123", null), "_123entryName123");
+    }
+
     @Test(description = "returns NSData when response format is binary")
     public void binaryDataTest() {
         final Swagger model = new SwaggerParser().read("src/test/resources/2_0/binaryDataTest.json");