diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
index ea16e75f1c94..9547e1d5a655 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
@@ -130,10 +130,10 @@ public class DefaultCodegen {
     @SuppressWarnings({ "static-method", "unchecked" })
     public Map<String, Object> postProcessAllModels(Map<String, Object> objs) {
         if (supportsInheritance) {
-            // Index all CodegenModels by name.
+            // Index all CodegenModels by model name.
             Map<String, CodegenModel> allModels = new HashMap<String, CodegenModel>();
             for (Entry<String, Object> entry : objs.entrySet()) {
-                String modelName = entry.getKey();
+                String modelName = toModelName(entry.getKey());
                 Map<String, Object> inner = (Map<String, Object>) entry.getValue();
                 List<Map<String, Object>> models = (List<Map<String, Object>>) inner.get("models");
                 for (Map<String, Object> mo : models) {
@@ -1013,7 +1013,7 @@ public class DefaultCodegen {
                     m.interfaces.add(interfaceRef);
                     addImport(m, interfaceRef);
                     if (allDefinitions != null) {
-                        final Model interfaceModel = allDefinitions.get(interfaceRef);
+                        final Model interfaceModel = allDefinitions.get(_interface.getSimpleRef());
                         if (supportsInheritance) {
                             addProperties(allProperties, allRequired, interfaceModel, allDefinitions);
                         } else {
@@ -1070,7 +1070,7 @@ public class DefaultCodegen {
                 required.addAll(mi.getRequired());
             }
         } else if (model instanceof RefModel) {
-            String interfaceRef = toModelName(((RefModel) model).getSimpleRef());
+            String interfaceRef = ((RefModel) model).getSimpleRef();
             Model interfaceModel = allDefinitions.get(interfaceRef);
             addProperties(properties, required, interfaceModel, allDefinitions);
         } else if (model instanceof ComposedModel) {
diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java
index b01c9d4cd5c4..1e18aae72b28 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java
@@ -298,6 +298,12 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
         return "_" + name;
     }
 
+    /**
+     * Concatenates an array of path segments into a path string.
+     * @param segments The path segments to concatenate. A segment may contain either of the file separator characters '\' or '/'.
+     * A segment is ignored if it is <code>null</code>, empty or &quot;.&quot;.
+     * @return A path string using the correct platform-specific file separator character.
+     */
     private String createPath(String... segments) {
         StringBuilder buf = new StringBuilder();
         for (String segment : segments) {
@@ -704,8 +710,8 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
         CodegenModel codegenModel = super.fromModel(name, model, allDefinitions);
 
         if (allDefinitions != null && codegenModel != null && codegenModel.parent != null && codegenModel.hasEnums) {
-            final Model parentModel = allDefinitions.get(toModelName(codegenModel.parent));
-            final CodegenModel parentCodegenModel = super.fromModel(codegenModel.parent, parentModel);
+            final Model parentModel = allDefinitions.get(codegenModel.parentSchema);
+            final CodegenModel parentCodegenModel = super.fromModel(codegenModel.parent, parentModel, allDefinitions);
             codegenModel = JavascriptClientCodegen.reconcileInlineEnums(codegenModel, parentCodegenModel);
         }
         if (model instanceof ArrayModel) {
diff --git a/modules/swagger-codegen/src/main/resources/Javascript/model.mustache b/modules/swagger-codegen/src/main/resources/Javascript/model.mustache
index 37a55ca71f1e..11b9ec74e0bb 100644
--- a/modules/swagger-codegen/src/main/resources/Javascript/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/Javascript/model.mustache
@@ -26,7 +26,7 @@
    * {{description}}{{/description}}
    * @alias module:{{#invokerPackage}}{{invokerPackage}}/{{/invokerPackage}}{{#modelPackage}}{{modelPackage}}/{{/modelPackage}}{{classname}}
    * @class{{#useInheritance}}{{#parent}}
-   * @extends {{#parentModel}}module:{{#invokerPackage}}{{invokerPackage}}/{{/invokerPackage}}{{#modelPackage}}{{modelPackage}}/{{/modelPackage}}{{parent}}{{/parentModel}}{{^parentModel}}{{#vendorExtensions.x-isArray}}Array{{/vendorExtensions.x-isArray}}{{#vendorExtensions.x-isMap}}Object{{/vendorExtensions.x-isMap}}{{/parentModel}}{{/parent}}{{#interfaces}}
+   * @extends {{#parentModel}}module:{{#invokerPackage}}{{invokerPackage}}/{{/invokerPackage}}{{#modelPackage}}{{modelPackage}}/{{/modelPackage}}{{classname}}{{/parentModel}}{{^parentModel}}{{#vendorExtensions.x-isArray}}Array{{/vendorExtensions.x-isArray}}{{#vendorExtensions.x-isMap}}Object{{/vendorExtensions.x-isMap}}{{/parentModel}}{{/parent}}{{#interfaces}}
    * @implements module:{{#invokerPackage}}{{invokerPackage}}/{{/invokerPackage}}{{#modelPackage}}{{modelPackage}}/{{/modelPackage}}{{.}}{{/interfaces}}{{/useInheritance}}{{#vendorExtensions.x-all-required}}
    * @param {{.}}{{/vendorExtensions.x-all-required}}
    */
@@ -34,7 +34,7 @@
     var _this = this;
 {{#parent}}{{^parentModel}}{{#vendorExtensions.x-isArray}}    _this = new Array();
     Object.setPrototypeOf(_this, exports);
-{{/vendorExtensions.x-isArray}}{{/parentModel}}{{/parent}}{{#useInheritance}}{{#parent}}{{#parentModel}}    {{classname}}.call(_this{{#vendorExtensions.x-all-required}}, {{.}}{{/vendorExtensions.x-all-required}});{{/parentModel}}{{/parent}}
+{{/vendorExtensions.x-isArray}}{{/parentModel}}{{/parent}}{{#useInheritance}}{{#parentModel}}    {{classname}}.call(_this{{#vendorExtensions.x-all-required}}, {{.}}{{/vendorExtensions.x-all-required}});{{/parentModel}}
 {{#interfaceModels}}    {{classname}}.call(_this{{#vendorExtensions.x-all-required}}, {{.}}{{/vendorExtensions.x-all-required}});
 {{/interfaceModels}}{{/useInheritance}}{{#vars}}{{#required}}    _this['{{baseName}}'] = {{name}};{{/required}}
 {{/vars}}{{#parent}}{{^parentModel}}    return _this;
@@ -51,7 +51,7 @@
     if (data){{! TODO: support polymorphism: discriminator property on data determines class to instantiate.}} {
       obj = obj || new exports();
 {{#parent}}{{^parentModel}}      ApiClient.constructFromObject(data, obj, {{vendorExtensions.x-itemType}});
-{{/parentModel}}{{/parent}}{{#useInheritance}}{{#parentModel}}{{#parent}}      {{parent}}.constructFromObject(data, obj);{{/parent}}{{/parentModel}}
+{{/parentModel}}{{/parent}}{{#useInheritance}}{{#parentModel}}      {{classname}}.constructFromObject(data, obj);{{/parentModel}}
 {{#interfaces}}      {{.}}.constructFromObject(data, obj);
 {{/interfaces}}{{/useInheritance}}{{#vars}}      if (data.hasOwnProperty('{{baseName}}')) {
         obj['{{baseName}}']{{{defaultValueWithParam}}}
@@ -59,10 +59,10 @@
 {{/vars}}    }
     return obj;
   }
-{{#useInheritance}}{{#parentModel}}{{#parent}}
-  exports.prototype = Object.create({{parent}}.prototype);
+{{#useInheritance}}{{#parentModel}}
+  exports.prototype = Object.create({{classname}}.prototype);
   exports.prototype.constructor = exports;
-{{/parent}}{{/parentModel}}{{/useInheritance}}
+{{/parentModel}}{{/useInheritance}}
 {{#vars}}{{#emitJSDoc}}
   /**{{#description}}
    * {{{description}}}{{/description}}