diff --git a/src/blenderbim/blenderbim/tool/qto.py b/src/blenderbim/blenderbim/tool/qto.py
index 7132618401..24e565e757 100644
--- a/src/blenderbim/blenderbim/tool/qto.py
+++ b/src/blenderbim/blenderbim/tool/qto.py
@@ -79,6 +79,7 @@ class Qto(blenderbim.core.tool.Qto):
             product.is_a(), ifcopenshell.util.element.get_predefined_type(product), qto_only=True
         )
         # See https://github.com/buildingSMART/IFC4.3.x-development/issues/851 for anomalies in Qto naming
+        # Should be in sync with cls.get_base_qto.
         applicable_qto: Union[str, None] = None
         for qto_name in applicable_qto_names:
             # No need for "Qto_" check since we use qto_only=True.
@@ -181,14 +182,24 @@ class Qto(blenderbim.core.tool.Qto):
     def get_base_qto(cls, product: ifcopenshell.entity_instance) -> Union[ifcopenshell.entity_instance, None]:
         if not hasattr(product, "IsDefinedBy"):
             return
+        # Should be in sync with cls.get_applicable_base_quantity_name.
+        base_qto_definition = None
+        base_qto_definition_name: Union[str, None] = None
         for rel in product.IsDefinedBy or []:
-            if not (
-                rel.is_a("IfcRelDefinesByProperties")
-                and "Base" in rel.RelatingPropertyDefinition.Name
-                and "Qto_" in rel.RelatingPropertyDefinition.Name
-            ):
+            definition = rel.RelatingPropertyDefinition
+            if not rel.is_a("IfcRelDefinesByProperties"):
                 continue
-            return rel.RelatingPropertyDefinition
+            definition = rel.RelatingPropertyDefinition
+            definition_name = definition.Name
+            if "Qto_" not in definition_name:
+                continue
+            if "Base" in definition_name:
+                return definition
+            if base_qto_definition and "BodyGeometryValidation" not in base_qto_definition_name:
+                continue
+            base_qto_definition = definition
+            base_qto_definition_name = definition_name
+        return base_qto_definition
 
     @classmethod
     def get_related_cost_item_quantities(cls, product: ifcopenshell.entity_instance) -> list[dict]:
diff --git a/src/blenderbim/test/tool/test_qto.py b/src/blenderbim/test/tool/test_qto.py
index 93a998e5e7..4713fcea4b 100644
--- a/src/blenderbim/test/tool/test_qto.py
+++ b/src/blenderbim/test/tool/test_qto.py
@@ -226,7 +226,7 @@ class TestGetBaseQto(test.bim.bootstrap.NewFile):
         assert subject.get_base_qto(product).id() == pset_qto.get_info()["id"]
         assert subject.get_base_qto(product).Name == pset_qto.Name
 
-    def test_isempty(self):
+    def test_no_quantities(self):
         ifc = ifcopenshell.file()
         tool.Ifc.set(ifc)
         wall = ifc.createIfcWall()
@@ -235,6 +235,46 @@ class TestGetBaseQto(test.bim.bootstrap.NewFile):
         product = tool.Ifc.get_entity(wall_obj)
         assert not subject.get_base_qto(product) == True
 
+    def test_anomaly_named_quantities(self):
+        ifc = ifcopenshell.file()
+        tool.Ifc.set(ifc)
+        product = ifcopenshell.api.run("root.create_entity", ifc, ifc_class="IfcBuildingElementProxy")
+        tool.Ifc.run(
+            "pset.add_qto",
+            product=product,
+            name="EQto_BodyGeometryValidation",
+        )
+        tool.Ifc.run(
+            "pset.add_qto",
+            product=product,
+            name="Qto_BuildingElementProxyQuantities",
+        )
+        # Prioritized over Qto_BodyGeometryValidation.
+        base_qto_name = subject.get_base_qto(product).Name
+        assert base_qto_name == "Qto_BuildingElementProxyQuantities"
+        # Ensure methods are in sync.
+        assert base_qto_name == subject.get_applicable_base_quantity_name(product)
+
+    def test_prioritize_base_over_other_qto(self):
+        ifc = ifcopenshell.file(schema="IFC4X3")
+        tool.Ifc.set(ifc)
+        product = ifcopenshell.api.run("root.create_entity", ifc, ifc_class="IfcWall")
+        tool.Ifc.run(
+            "pset.add_qto",
+            product=product,
+            name="Qto_BodyGeometryValidation",
+        )
+        tool.Ifc.run(
+            "pset.add_qto",
+            product=product,
+            name="Qto_WallBaseQuantities",
+        )
+        # Prioritized over Qto_BodyGeometryValidation.
+        base_qto_name = subject.get_base_qto(product).Name
+        assert base_qto_name == "Qto_WallBaseQuantities"
+        # Ensure methods are in sync.
+        assert base_qto_name == subject.get_applicable_base_quantity_name(product)
+
 
 class TestGetRelatedCostItemQuantities(test.bim.bootstrap.NewFile):
     def test_run(self):