diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/DependencyUtils.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/DependencyUtils.java
index 6ce2941a..a8af8363 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/DependencyUtils.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/DependencyUtils.java
@@ -44,16 +44,23 @@ public static <T extends OperationInterface> Map<OperationInterface, List<Operat
             }
             if (isRoot) {
                 for (final OperationInterface rootInterface : groupedDependencies.keySet()) {
-                    final Optional<String> commonInterfaceName = grouplessDependency.getName()
+                    final Optional<String> commonName = grouplessDependency.getName()
                         .getCommonInterface(rootInterface.getName());
                     boolean containsOtherDependency = false;
 
-                    if (!commonInterfaceName.isPresent()) {
+                    if (!commonName.isPresent()) {
                         continue;
                     }
 
-                    final OperationInterface commonInterface = new EntireInterface(rootInterface.getName()
-                        .createInterface(commonInterfaceName.get()));
+                    Name commonInterfaceName = rootInterface.getName()
+                        .createName(commonName.get());
+                    OperationInterface commonInterface;
+
+                    if (commonInterfaceName instanceof RESTOperationName restName) {
+                        commonInterface = new RESTOperationUnion(restName);
+                    } else {
+                        commonInterface = new EntireInterface(commonInterfaceName);
+                    }
 
                     for (final OperationInterface dependency : allDependencies) {
                         // Check all foreign dependencies
@@ -68,8 +75,12 @@ public static <T extends OperationInterface> Map<OperationInterface, List<Operat
                         // De-duplicate interfaces.
                         final Set<OperationInterface> interfaces = new HashSet<>(
                                 groupedDependencies.remove(rootInterface));
-                        interfaces.add(commonInterface);
-                        interfaces.add(rootInterface);
+                        if (!(commonInterface instanceof RESTOperationUnion)) {
+                            interfaces.add(commonInterface);
+                        }
+                        if (!(rootInterface instanceof RESTOperationUnion)) {
+                            interfaces.add(rootInterface);
+                        }
                         interfaces.add(grouplessDependency);
                         groupedDependencies.put(commonInterface, new ArrayList<>(interfaces));
                         isRoot = false;
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/EntireInterface.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/EntireInterface.java
index 0d9b579c..9aef51e4 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/EntireInterface.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/EntireInterface.java
@@ -10,14 +10,14 @@
 
 public class EntireInterface implements OperationInterface {
     private final Optional<ITypeBinding> binding;
-    private final InterfaceName name;
+    private final Name name;
 
-    public EntireInterface(final InterfaceName name) {
+    public EntireInterface(final Name name) {
         this.binding = Optional.empty();
         this.name = name;
     }
 
-    public EntireInterface(final ITypeBinding binding, final InterfaceName name) {
+    public EntireInterface(final ITypeBinding binding, final Name name) {
         this.binding = Optional.of(binding);
         this.name = name;
     }
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaInterfaceName.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaInterfaceName.java
index 5f661674..975fef99 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaInterfaceName.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaInterfaceName.java
@@ -21,7 +21,7 @@ public List<String> getInterfaces() {
     }
 
     @Override
-    public InterfaceName createInterface(final String name) {
+    public InterfaceName createName(final String name) {
         return new JavaInterfaceName(name);
     }
 
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaOperationName.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaOperationName.java
index 6b0f35be..8e67a830 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaOperationName.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/JavaOperationName.java
@@ -32,7 +32,7 @@ public String getInterface() {
     }
 
     @Override
-    public InterfaceName createInterface(final String name) {
+    public InterfaceName createName(final String name) {
         return new JavaInterfaceName(name);
     }
 
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Name.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Name.java
index b87002e7..e39ed20a 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Name.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Name.java
@@ -6,7 +6,7 @@
 import java.util.Set;
 
 public interface Name {
-    InterfaceName createInterface(String name);
+    Name createName(String name);
 
     /**
      * @returns interfaces that this name is part of, sorted from specific to general.
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Operation.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Operation.java
index 0ff8d74d..a2a78fa5 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Operation.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/Operation.java
@@ -24,6 +24,15 @@ public OperationName getName() {
         return this.name;
     }
 
+    @Override
+    public boolean isPartOf(final OperationInterface other) {
+        if (other instanceof Operation otherOperation) {
+            return Objects.equals(this.binding, otherOperation.binding);
+        } else {
+            return OperationInterface.super.isPartOf(other);
+        }
+    }
+
     @Override
     public Map<OperationInterface, Set<Operation>> simplified() {
         return Map.of(this, Set.of(this));
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTName.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTName.java
index 42945d0a..f74a430f 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTName.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTName.java
@@ -57,7 +57,7 @@ public List<String> getInterfaces() {
     }
 
     @Override
-    public InterfaceName createInterface(final String name) {
+    public InterfaceName createName(final String name) {
         return parse(name).orElseThrow();
     }
 
@@ -164,6 +164,10 @@ public boolean isPartOf(final String iface) {
     }
 
     public static Optional<RESTName> parse(final String iface) {
+        if (iface.contains("[")) {
+            // If a HTTP method is present, iface is not a RESTName.
+            return Optional.empty();
+        }
         final Optional<List<String>> interfacePathOption = parsePath(iface);
         if (interfacePathOption.isEmpty()) {
             return Optional.empty();
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationName.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationName.java
index e2590bf7..101bd10a 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationName.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationName.java
@@ -55,8 +55,8 @@ public List<String> getInterfaces() {
     }
 
     @Override
-    public InterfaceName createInterface(final String name) {
-        return RESTName.parse(name)
+    public Name createName(final String name) {
+        return RESTOperationName.parse(name)
             .orElseThrow();
     }
 
@@ -113,6 +113,11 @@ public Optional<String> getCommonInterface(final Name other) {
 
     @Override
     public boolean isPartOf(final String iface) {
+        if (RESTName.parse(iface)
+            .isPresent()) {
+            return restName.isPartOf(iface);
+        }
+
         Optional<RESTOperationName> parsedIface = parse(iface);
         if (parsedIface.isEmpty()) {
             return false;
@@ -120,14 +125,14 @@ public boolean isPartOf(final String iface) {
 
         RESTOperationName restIface = parsedIface.get();
 
-        if (!this.restName.isPartOf(restIface.restName.toString())) {
+        if (!this.restName.equals(restIface.restName)) {
             return false;
         }
 
         Set<HTTPMethod> normalHttpMethods = new HashSet<>(this.httpMethods);
         normalHttpMethods.remove(HTTPMethod.WILDCARD);
 
-        if (this.restName.equals(restIface.restName) && !restIface.httpMethods.contains(HTTPMethod.WILDCARD)
+        if (!restIface.httpMethods.contains(HTTPMethod.WILDCARD)
                 && !restIface.httpMethods.containsAll(this.httpMethods)) {
             return false;
         }
diff --git a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationUnion.java b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationUnion.java
index 8c5ab9cd..bae45f1f 100644
--- a/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationUnion.java
+++ b/bundles/org.palladiosimulator.retriever.extraction/src/org/palladiosimulator/retriever/extraction/commonalities/RESTOperationUnion.java
@@ -1,6 +1,7 @@
 package org.palladiosimulator.retriever.extraction.commonalities;
 
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 public class RESTOperationUnion implements OperationInterface {
@@ -24,4 +25,30 @@ public Map<OperationInterface, Set<Operation>> simplified() {
     public String getInterface() {
         return name.getInterface();
     }
+
+    @Override
+    public String toString() {
+        return name.toString();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        RESTOperationUnion other = (RESTOperationUnion) obj;
+        return Objects.equals(name, other.name);
+    }
+
 }