diff --git a/src/ansys/motorcad/core/geometry.py b/src/ansys/motorcad/core/geometry.py
index b78dca47f..92a047183 100644
--- a/src/ansys/motorcad/core/geometry.py
+++ b/src/ansys/motorcad/core/geometry.py
@@ -36,6 +36,7 @@ class Region(object):
     def __init__(self, motorcad_instance=None):
         """Create geometry region and set parameters to defaults."""
         self.name = ""
+        self._base_name = ""
         self.material = "air"
         self.colour = (0, 0, 0)
         self.area = 0.0
@@ -175,7 +176,14 @@ def _from_json(cls, json, motorcad_instance=None):
             new_region._region_type = RegionType(json["region_type"])
 
         # self.Entities = json.Entities
-        new_region.name = json["name"]
+
+        if "name_unique" in json:
+            new_region.name = json["name_unique"]
+        else:
+            new_region.name = json["name"]
+
+        new_region._base_name = json["name"]
+
         new_region.material = json["material"]
 
         new_region.colour = (json["colour"]["r"], json["colour"]["g"], json["colour"]["b"])
@@ -217,6 +225,7 @@ def _to_json(self):
 
         region_dict = {
             "name": self.name,
+            "name_base": self._base_name,
             "material": self.material,
             "colour": {"r": self.colour[0], "g": self.colour[1], "b": self.colour[2]},
             "area": self.area,
diff --git a/tests/test_geometry.py b/tests/test_geometry.py
index 815e1a01b..5299ecb78 100644
--- a/tests/test_geometry.py
+++ b/tests/test_geometry.py
@@ -343,6 +343,7 @@ def test_region_remove_entity():
 def test_region_from_json():
     raw_region = {
         "name": "test_region",
+        "name_base": "test_region_base",
         "material": "copper",
         "colour": {"r": 240, "g": 0, "b": 0},
         "area": 5.1,
@@ -359,6 +360,7 @@ def test_region_from_json():
 
     test_region = geometry.Region()
     test_region.name = "test_region"
+    test_region._base_name = "test_region_base"
     test_region.material = "copper"
     test_region.colour = (240, 0, 0)
     test_region.area = 5.1
@@ -379,6 +381,7 @@ def test_region_from_json():
 def test_region_to_json():
     raw_region = {
         "name": "test_region",
+        "name_base": "test_region_base",
         "material": "copper",
         "colour": {"r": 240, "g": 0, "b": 0},
         "area": 5.1,
@@ -396,6 +399,7 @@ def test_region_to_json():
 
     test_region = geometry.Region()
     test_region.name = "test_region"
+    test_region._base_name = "test_region_base"
     test_region.material = "copper"
     test_region.colour = (240, 0, 0)
     test_region.area = 5.1