diff --git a/api/internal/target/kusttarget.go b/api/internal/target/kusttarget.go
index 8176ba9eb..eeb23bf70 100644
--- a/api/internal/target/kusttarget.go
+++ b/api/internal/target/kusttarget.go
@@ -29,14 +29,14 @@ import (
 
 // KustTarget encapsulates the entirety of a kustomization build.
 type KustTarget struct {
-	kustomization   *types.Kustomization
-	kustFileName    string
-	ldr             ifc.Loader
-	validator       ifc.Validator
-	rFactory        *resmap.Factory
-	pLdr            *loader.Loader
-	origin          *resource.Origin
-	parentNamespace string // namespace inherited from parent kustomization for HelmCharts
+	kustomization     *types.Kustomization
+	kustFileName      string
+	ldr               ifc.Loader
+	validator         ifc.Validator
+	rFactory          *resmap.Factory
+	pLdr              *loader.Loader
+	origin            *resource.Origin
+	helmRootNamespace string // namespace inherited from parent kustomization for HelmCharts
 }
 
 // NewKustTarget returns a new instance of KustTarget.
@@ -497,15 +497,15 @@ func (kt *KustTarget) accumulateDirectory(
 	}
 	subKt.kustomization.BuildMetadata = kt.kustomization.BuildMetadata
 	subKt.origin = kt.origin
-	// Propagate namespace to child kustomization's parentNamespace for HelmCharts
+	// Propagate namespace to child kustomization's helmRootNamespace for HelmCharts
 	// This ensures Helm charts in base kustomizations inherit namespace from overlays
 	// without affecting other transformers like patches
 	// Fixes https://github.com/kubernetes-sigs/kustomize/issues/6031
 	// Fixes https://github.com/kubernetes-sigs/kustomize/issues/6027
 	if kt.kustomization.Namespace != "" {
-		subKt.parentNamespace = kt.kustomization.Namespace
-	} else if kt.parentNamespace != "" {
-		subKt.parentNamespace = kt.parentNamespace
+		subKt.helmRootNamespace = kt.kustomization.Namespace
+	} else if kt.helmRootNamespace != "" {
+		subKt.helmRootNamespace = kt.helmRootNamespace
 	}
 	var bytes []byte
 	if openApiPath, exists := subKt.Kustomization().OpenAPI["path"]; exists {
diff --git a/api/internal/target/kusttarget_configplugin.go b/api/internal/target/kusttarget_configplugin.go
index bd358b484..aa57e1295 100644
--- a/api/internal/target/kusttarget_configplugin.go
+++ b/api/internal/target/kusttarget_configplugin.go
@@ -172,8 +172,8 @@ var generatorConfigurators = map[builtinhelpers.BuiltinPluginType]func(
 			if c.HelmChart.Namespace == "" {
 				if kt.kustomization.Namespace != "" {
 					c.HelmChart.Namespace = kt.kustomization.Namespace
-				} else if kt.parentNamespace != "" {
-					c.HelmChart.Namespace = kt.parentNamespace
+				} else if kt.helmRootNamespace != "" {
+					c.HelmChart.Namespace = kt.helmRootNamespace
 				}
 			}
 			p := f()