diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
index dabc2e380c5..584765d0f59 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/core/CommonizationVisitor.kt
@@ -85,9 +85,8 @@ internal class CommonizationVisitor(
             // companion object should have the same name for each target class, then it could be set to common class
             val companionObjectName = node.targetDeclarations.mapTo(HashSet()) { it!!.companion }.singleOrNull()
             if (companionObjectName != null) {
-                val companionObjectClassId = node.classifierId.createNestedEntityId(companionObjectName)
-                val companionObjectNode = classifiers.commonized.classNode(companionObjectClassId)
-                    ?: error("Can't find companion object with class ID $companionObjectClassId")
+                val companionObjectNode = node.classes[companionObjectName]
+                    ?: error("Can't find node for companion object $companionObjectName in node for class ${node.classifierName}")
 
                 if (companionObjectNode.commonDeclaration() != null) {
                     // companion object has been successfully commonized
@@ -132,7 +131,7 @@ internal class CommonizationVisitor(
 
             val expandedClassNode = classifiers.commonized.classNode(expandedClassId) ?: return null
             val expandedClass = expandedClassNode.targetDeclarations[index]
-                ?: error("Can't find expanded class with class ID $expandedClassId and index $index for type alias $classifierId")
+                ?: error("Can't find expanded class with class ID $expandedClassId and index $index for type alias $classifierName")
 
             for (supertype in expandedClass.supertypes) {
                 supertypesMap.getOrPut(supertype) { CommonizedGroup(targetDeclarations.size) }[index] = supertype
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirClassNode.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirClassNode.kt
index 71fca5e3f9a..d7548c16207 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirClassNode.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirClassNode.kt
@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.descriptors.commonizer.mergedtree
 
 import gnu.trove.THashMap
 import org.jetbrains.kotlin.descriptors.commonizer.cir.CirClass
-import org.jetbrains.kotlin.descriptors.commonizer.cir.CirEntityId
 import org.jetbrains.kotlin.descriptors.commonizer.cir.CirName
 import org.jetbrains.kotlin.descriptors.commonizer.utils.CommonizedGroup
 import org.jetbrains.kotlin.storage.NullableLazyValue
@@ -15,8 +14,7 @@ import org.jetbrains.kotlin.storage.NullableLazyValue
 class CirClassNode(
     override val targetDeclarations: CommonizedGroup<CirClass>,
     override val commonDeclaration: NullableLazyValue<CirClass>,
-    override val classifierId: CirEntityId
-) : CirNodeWithClassifierId<CirClass, CirClass>, CirNodeWithMembers<CirClass, CirClass> {
+) : CirClassifierNode<CirClass, CirClass>, CirNodeWithMembers<CirClass, CirClass> {
 
     val constructors: MutableMap<ConstructorApproximationKey, CirClassConstructorNode> = THashMap()
     override val properties: MutableMap<PropertyApproximationKey, CirPropertyNode> = THashMap()
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirNode.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirNode.kt
index b6069ae877c..d22683d2abc 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirNode.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirNode.kt
@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.descriptors.commonizer.mergedtree
 
 import org.jetbrains.kotlin.descriptors.commonizer.cir.*
 import org.jetbrains.kotlin.descriptors.commonizer.utils.CommonizedGroup
+import org.jetbrains.kotlin.descriptors.commonizer.utils.firstNonNull
 import org.jetbrains.kotlin.storage.NullableLazyValue
 
 interface CirNode<T : CirDeclaration, R : CirDeclaration> {
@@ -26,8 +27,8 @@ interface CirNode<T : CirDeclaration, R : CirDeclaration> {
             if (node is CirPackageNode) {
                 append("packageName=").append(node.packageName).append(", ")
             }
-            if (node is CirNodeWithClassifierId) {
-                append("classifierId=").append(node.classifierId).append(", ")
+            if (node is CirClassifierNode) {
+                append("classifierName=").append(node.classifierName).append(", ")
             }
             append("target=")
             node.targetDeclarations.joinTo(this)
@@ -37,8 +38,9 @@ interface CirNode<T : CirDeclaration, R : CirDeclaration> {
     }
 }
 
-interface CirNodeWithClassifierId<T : CirClassifier, R : CirClassifier> : CirNode<T, R> {
-    val classifierId: CirEntityId
+interface CirClassifierNode<T : CirClassifier, R : CirClassifier> : CirNode<T, R> {
+    val classifierName: CirName
+        get() = targetDeclarations.firstNonNull<CirClassifier>().name
 }
 
 interface CirNodeWithLiftingUp<T : CirDeclaration, R : CirDeclaration> : CirNode<T, R> {
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirTypeAliasNode.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirTypeAliasNode.kt
index cddfbfb982e..8b3d58adc92 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirTypeAliasNode.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/CirTypeAliasNode.kt
@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.descriptors.commonizer.mergedtree
 
 import org.jetbrains.kotlin.descriptors.commonizer.cir.CirClassifier
-import org.jetbrains.kotlin.descriptors.commonizer.cir.CirEntityId
 import org.jetbrains.kotlin.descriptors.commonizer.cir.CirTypeAlias
 import org.jetbrains.kotlin.descriptors.commonizer.utils.CommonizedGroup
 import org.jetbrains.kotlin.storage.NullableLazyValue
@@ -14,8 +13,7 @@ import org.jetbrains.kotlin.storage.NullableLazyValue
 class CirTypeAliasNode(
     override val targetDeclarations: CommonizedGroup<CirTypeAlias>,
     override val commonDeclaration: NullableLazyValue<CirClassifier>,
-    override val classifierId: CirEntityId
-) : CirNodeWithClassifierId<CirTypeAlias, CirClassifier>, CirNodeWithLiftingUp<CirTypeAlias, CirClassifier> {
+) : CirClassifierNode<CirTypeAlias, CirClassifier>, CirNodeWithLiftingUp<CirTypeAlias, CirClassifier> {
 
     override fun <T, R> accept(visitor: CirNodeVisitor<T, R>, data: T): R =
         visitor.visitTypeAliasNode(this, data)
diff --git a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/nodeBuilders.kt b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/nodeBuilders.kt
index dada2dfd93f..82644db2801 100644
--- a/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/nodeBuilders.kt
+++ b/native/commonizer/src/org/jetbrains/kotlin/descriptors/commonizer/mergedtree/nodeBuilders.kt
@@ -83,7 +83,7 @@ internal fun buildClassNode(
     commonizerProducer = { ClassCommonizer(classifiers) },
     recursionMarker = CirClassRecursionMarker,
     nodeProducer = { targetDeclarations, commonDeclaration ->
-        CirClassNode(targetDeclarations, commonDeclaration, classId).also {
+        CirClassNode(targetDeclarations, commonDeclaration).also {
             classifiers.commonized.addClassNode(classId, it)
         }
     }
@@ -113,7 +113,7 @@ internal fun buildTypeAliasNode(
     commonizerProducer = { TypeAliasCommonizer(classifiers) },
     recursionMarker = CirClassifierRecursionMarker,
     nodeProducer = { targetDeclarations, commonDeclaration ->
-        CirTypeAliasNode(targetDeclarations, commonDeclaration, typeAliasId).also {
+        CirTypeAliasNode(targetDeclarations, commonDeclaration).also {
             classifiers.commonized.addTypeAliasNode(typeAliasId, it)
         }
     }
diff --git a/native/commonizer/tests/org/jetbrains/kotlin/descriptors/commonizer/utils/mocks.kt b/native/commonizer/tests/org/jetbrains/kotlin/descriptors/commonizer/utils/mocks.kt
index d689e0cc49b..60c157fc34c 100644
--- a/native/commonizer/tests/org/jetbrains/kotlin/descriptors/commonizer/utils/mocks.kt
+++ b/native/commonizer/tests/org/jetbrains/kotlin/descriptors/commonizer/utils/mocks.kt
@@ -138,8 +138,7 @@ internal val MOCK_CLASSIFIERS = CirKnownClassifiers(
                     isInner = false,
                     isExternal = false
                 )
-            },
-            CirEntityId.create("kotlin/Any")
+            }
         )
 
         override fun classNode(classId: CirEntityId) = MOCK_CLASS_NODE