diff --git a/src/blenderbim/blenderbim/bim/module/geometry/operator.py b/src/blenderbim/blenderbim/bim/module/geometry/operator.py
index ad207685e1..d23552506f 100644
--- a/src/blenderbim/blenderbim/bim/module/geometry/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/geometry/operator.py
@@ -1050,7 +1050,7 @@ class DuplicateMoveLinkedAggregate(bpy.types.Operator):
             if self.group_name in product_groups_name:
                 return
 
-            linked_aggregate_group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), Name=self.group_name)
+            linked_aggregate_group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), name=self.group_name)
             ifcopenshell.api.run("group.assign_group", tool.Ifc.get(), products=[element], group=linked_aggregate_group)
 
         def custom_incremental_naming_for_element_assembly(old_to_new):
diff --git a/src/blenderbim/blenderbim/bim/module/search/operator.py b/src/blenderbim/blenderbim/bim/module/search/operator.py
index 9865e7cd28..c2bc7dba21 100644
--- a/src/blenderbim/blenderbim/bim/module/search/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/search/operator.py
@@ -215,7 +215,7 @@ class SaveSearch(Operator, tool.Ifc.Operator):
             group = group[0]
             group.Description = description
         else:
-            group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), Name=self.name, Description=description)
+            group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), name=self.name, description=description)
         if results:
             ifcopenshell.api.run("group.assign_group", tool.Ifc.get(), products=list(results), group=group)
 
@@ -368,7 +368,7 @@ class SaveColourscheme(Operator, tool.Ifc.Operator):
             description = json.dumps(
                 {"type": "BBIM_Search", "colourscheme": colourscheme, "colourscheme_query": query}
             )
-            group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), Name=self.name, Description=description)
+            group = ifcopenshell.api.run("group.add_group", tool.Ifc.get(), name=self.name, description=description)
 
     def invoke(self, context, event):
         return context.window_manager.invoke_props_dialog(self)
diff --git a/src/blenderbim/blenderbim/tool/sequence.py b/src/blenderbim/blenderbim/tool/sequence.py
index 17c08f3093..618a678f78 100644
--- a/src/blenderbim/blenderbim/tool/sequence.py
+++ b/src/blenderbim/blenderbim/tool/sequence.py
@@ -1630,7 +1630,7 @@ class Sequence(blenderbim.core.tool.Sequence):
             group.Description = json.dumps(description)
         else:
             description = json.dumps({"type": "BBIM_AnimationColorScheme", "colourscheme": colour_scheme})
-            group = tool.Ifc.run("group.add_group", Name=name, Description=description)
+            group = tool.Ifc.run("group.add_group", name=name, description=description)
         return group[0]
 
     @classmethod
diff --git a/src/ifcopenshell-python/ifcopenshell/api/__init__.py b/src/ifcopenshell-python/ifcopenshell/api/__init__.py
index b4311519fc..d3d0b2f475 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/__init__.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/__init__.py
@@ -67,6 +67,20 @@ def batching_argument_deprecation(
     return (replace_usecase or usecase_path, settings)
 
 
+def renamed_arguments_deprecation(
+    usecase_path: str, settings: dict, arguments_remapped: dict[str, str]
+) -> tuple[str, dict]:
+    for prev_argument, new_argument in arguments_remapped.items():
+        if prev_argument in settings:
+            print(
+                f"WARNING. `{prev_argument}` argument is deprecated for API method "
+                f'"{usecase_path}" and should be replaced with `{new_argument}`.'
+            )
+            settings = settings | {new_argument: settings[prev_argument]}
+            settings.pop(prev_argument)
+    return (usecase_path, settings)
+
+
 ARGUMENTS_DEPRECATION = {
     "spatial.assign_container": partial(
         batching_argument_deprecation, prev_argument="product", new_argument="products"
@@ -143,6 +157,10 @@ ARGUMENTS_DEPRECATION = {
     "project.unassign_declaration": partial(
         batching_argument_deprecation, prev_argument="definition", new_argument="definitions"
     ),
+    "group.add_group": partial(
+        renamed_arguments_deprecation, arguments_remapped={"Name": "name", "Description": "description"}
+    ),
+    "layer.add_layer": partial(renamed_arguments_deprecation, arguments_remapped={"Name": "name"}),
 }
 
 
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/add_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/add_group.py
index 44553bddcf..bce9ca61bd 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/add_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/add_group.py
@@ -23,7 +23,7 @@ from typing import Optional
 
 
 def add_group(
-    file: ifcopenshell.file, Name: str = "Unnamed", Description: Optional[str] = None
+    file: ifcopenshell.file, name: str = "Unnamed", description: Optional[str] = None
 ) -> ifcopenshell.entity_instance:
     """Adds a new group
 
@@ -37,8 +37,8 @@ def add_group(
 
     :param Name: The name of the group. Defaults to "Unnamed"
     :type Name: str, optional
-    :param Description: The description of the purpose of the group.
-    :type Description: str, optional
+    :param description: The description of the purpose of the group.
+    :type description: str, optional
     :return: The newly created IfcGroup
     :rtype: ifcopenshell.entity_instance
 
@@ -46,11 +46,11 @@ def add_group(
 
     .. code:: python
 
-        ifcopenshell.api.run("group.add_group", model, Name="Unit 1A")
+        ifcopenshell.api.run("group.add_group", model, name="Unit 1A")
     """
     settings = {
-        "Name": Name or "Unnamed",
-        "Description": Description,
+        "name": name or "Unnamed",
+        "description": description,
     }
 
     return file.create_entity(
@@ -58,7 +58,7 @@ def add_group(
         **{
             "GlobalId": ifcopenshell.guid.new(),
             "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", file),
-            "Name": settings["Name"],
-            "Description": settings["Description"],
+            "Name": settings["name"],
+            "Description": settings["description"],
         }
     )
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/assign_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/assign_group.py
index a11b15c6de..0edceb9fa2 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/assign_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/assign_group.py
@@ -42,7 +42,7 @@ def assign_group(
 
     .. code:: python
 
-        group = ifcopenshell.api.run("group.add_group", model, Name="Furniture")
+        group = ifcopenshell.api.run("group.add_group", model, name="Furniture")
         ifcopenshell.api.run("group.assign_group", model,
             products=model.by_type("IfcFurniture"), group=group)
     """
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/edit_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/edit_group.py
index 912b3c30c9..dca5f781f4 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/edit_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/edit_group.py
@@ -36,7 +36,7 @@ def edit_group(file: ifcopenshell.file, group: ifcopenshell.entity_instance, att
 
     .. code:: python
 
-        group = ifcopenshell.api.run("group.add_group", model, Name="Unit 1A")
+        group = ifcopenshell.api.run("group.add_group", model, name="Unit 1A")
         ifcopenshell.api.run("group.edit_group", model,
             group=group, attributes={"Description": "All furniture and joinery included in the unit"})
     """
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
index d17806d6c3..9097e1e229 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
@@ -36,7 +36,7 @@ def remove_group(file: ifcopenshell.file, group: ifcopenshell.entity_instance) -
 
     .. code:: python
 
-        group = ifcopenshell.api.run("group.add_group", model, Name="Unit 1A")
+        group = ifcopenshell.api.run("group.add_group", model, name="Unit 1A")
         ifcopenshell.api.run("group.remove_group", model, group=group)
     """
     settings = {"group": group}
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/unassign_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/unassign_group.py
index c486cceab6..7d181455cc 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/unassign_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/unassign_group.py
@@ -39,7 +39,7 @@ def unassign_group(
 
     .. code:: python
 
-        group = ifcopenshell.api.run("group.add_group", model, Name="Furniture")
+        group = ifcopenshell.api.run("group.add_group", model, name="Furniture")
         furniture = model.by_type("IfcFurniture")
         ifcopenshell.api.run("group.assign_group", model, products=furniture, group=group)
 
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/update_group_products.py b/src/ifcopenshell-python/ifcopenshell/api/group/update_group_products.py
index c68992f7a3..dda9ba954d 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/update_group_products.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/update_group_products.py
@@ -40,7 +40,7 @@ def update_group_products(
 
     .. code:: python
 
-        group = ifcopenshell.api.run("group.add_group", model, Name="Furniture")
+        group = ifcopenshell.api.run("group.add_group", model, name="Furniture")
         ifcopenshell.api.run("group.update_group_products", model,
             products=model.by_type("IfcFurniture"), group=group)
     """
diff --git a/src/ifcopenshell-python/ifcopenshell/api/layer/add_layer.py b/src/ifcopenshell-python/ifcopenshell/api/layer/add_layer.py
index d3a6c162c8..d09675cabe 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/layer/add_layer.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/layer/add_layer.py
@@ -19,7 +19,7 @@ import ifcopenshell
 from typing import Optional
 
 
-def add_layer(file: ifcopenshell.file, Name: Optional[str] = None) -> ifcopenshell.entity_instance:
+def add_layer(file: ifcopenshell.file, name: str = "Unnamed") -> ifcopenshell.entity_instance:
     """Adds a new layer
 
     An IFC layer is like a CAD layer. Portions of an object's geometry
@@ -34,13 +34,13 @@ def add_layer(file: ifcopenshell.file, Name: Optional[str] = None) -> ifcopenshe
     Some software that are still based on layers, such as Tekla or ArchiCAD
     may also use this layer information for filtering.
 
-    :param Name: The name of the layer. Defaults to "Unnamed".
-    :type Name: str, optional
+    :param name: The name of the layer. Defaults to "Unnamed".
+    :type name: str, optional
     :return: The newly created IfcPresentationLayerAssignment element
     :rtype: ifcopenshell.entity_instance
 
     Example:
 
-        ifcopenshell.api.run("layer.add_layer", model, Name="AI-WALL-FULL-DIMS-N")
+        ifcopenshell.api.run("layer.add_layer", model, name="AI-WALL-FULL-DIMS-N")
     """
-    return file.create_entity("IfcPresentationLayerAssignment", Name=Name or "Unnamed")
+    return file.create_entity("IfcPresentationLayerAssignment", Name=name)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/layer/assign_layer.py b/src/ifcopenshell-python/ifcopenshell/api/layer/assign_layer.py
index 70926625c3..9c7cbd4c46 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/layer/assign_layer.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/layer/assign_layer.py
@@ -59,7 +59,7 @@ def assign_layer(
         ifcopenshell.api.run("geometry.edit_object_placement", model, product=wall)
 
         # Now let's create a layer that contains walls
-        layer = ifcopenshell.api.run("layer.add_layer", model, Name="AI-WALL")
+        layer = ifcopenshell.api.run("layer.add_layer", model, name="AI-WALL")
 
         # And assign our wall representation item (in this example, there is
         # only one item) to the layer.
diff --git a/src/ifcopenshell-python/ifcopenshell/api/layer/edit_layer.py b/src/ifcopenshell-python/ifcopenshell/api/layer/edit_layer.py
index 1590cc4559..9ef941c82d 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/layer/edit_layer.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/layer/edit_layer.py
@@ -36,7 +36,7 @@ def edit_layer(file: ifcopenshell.file, layer: ifcopenshell.entity_instance, att
 
     .. code:: python
 
-        layer = ifcopenshell.api.run("layer.add_layer", model, Name="AI-WALL")
+        layer = ifcopenshell.api.run("layer.add_layer", model, name="AI-WALL")
         ifcopenshell.api.run("layer.edit_layer", model,
             layer=layer, attributes={"Description": "All walls, based on the AIA standard."})
     """
diff --git a/src/ifcopenshell-python/ifcopenshell/api/layer/remove_layer.py b/src/ifcopenshell-python/ifcopenshell/api/layer/remove_layer.py
index 27b3e80ac1..d576897fd6 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/layer/remove_layer.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/layer/remove_layer.py
@@ -33,7 +33,7 @@ def remove_layer(file: ifcopenshell.file, layer: ifcopenshell.entity_instance) -
 
     .. code:: python
 
-        layer = ifcopenshell.api.run("layer.add_layer", model, Name="AI-WALL")
+        layer = ifcopenshell.api.run("layer.add_layer", model, name="AI-WALL")
         ifcopenshell.api.run("layer.remove_layer", model, layer=layer)
     """
     file.remove(layer)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/layer/unassign_layer.py b/src/ifcopenshell-python/ifcopenshell/api/layer/unassign_layer.py
index 9418a28ad6..3fde793058 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/layer/unassign_layer.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/layer/unassign_layer.py
@@ -56,7 +56,7 @@ def unassign_layer(
         ifcopenshell.api.run("geometry.edit_object_placement", model, product=wall)
 
         # Now let's create a layer that contains walls
-        layer = ifcopenshell.api.run("layer.add_layer", model, Name="AI-WALL")
+        layer = ifcopenshell.api.run("layer.add_layer", model, name="AI-WALL")
 
         # And assign our wall representation item (in this example, there is
         # only one item) to the layer.
diff --git a/src/ifcopenshell-python/test/api/group/test_add_group.py b/src/ifcopenshell-python/test/api/group/test_add_group.py
new file mode 100644
index 0000000000..49e5379ade
--- /dev/null
+++ b/src/ifcopenshell-python/test/api/group/test_add_group.py
@@ -0,0 +1,37 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import test.bootstrap
+import ifcopenshell.api
+import ifcopenshell.util.element
+
+
+class TestAddGroup(test.bootstrap.IFC4):
+    def test_add_group_no_arguments(self):
+        group = ifcopenshell.api.run("group.add_group", self.file)
+        assert group.Name == "Unnamed"
+        assert group.Description == None
+
+    def test_add_group(self):
+        group = ifcopenshell.api.run("group.add_group", self.file, name="Name", description="Description")
+        assert group.Name == "Name"
+        assert group.Description == "Description"
+
+
+class TestAddGroupIFC2X3(test.bootstrap.IFC2X3, TestAddGroup):
+    pass
diff --git a/src/ifcopenshell-python/test/api/layer/test_add_layer.py b/src/ifcopenshell-python/test/api/layer/test_add_layer.py
new file mode 100644
index 0000000000..8889674075
--- /dev/null
+++ b/src/ifcopenshell-python/test/api/layer/test_add_layer.py
@@ -0,0 +1,34 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import test.bootstrap
+import ifcopenshell.api
+
+
+class TestAddLayer(test.bootstrap.IFC4):
+    def test_add_layer_no_arguments(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file)
+        assert layer.Name == "Unnamed"
+
+    def test_assign_additional_items(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file, name="Name")
+        assert layer.Name == "Name"
+
+
+class TestAddLayerIFC2X3(test.bootstrap.IFC2X3, TestAddLayer):
+    pass
diff --git a/src/ifcopenshell-python/test/api/root/test_remove_product.py b/src/ifcopenshell-python/test/api/root/test_remove_product.py
index ebfaa8a4d8..176d39be25 100644
--- a/src/ifcopenshell-python/test/api/root/test_remove_product.py
+++ b/src/ifcopenshell-python/test/api/root/test_remove_product.py
@@ -409,7 +409,7 @@ class TestRemoveProduct(test.bootstrap.IFC4):
 
     def test_removing_orphaned_group_relationships(self):
         element = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcWall")
-        group = ifcopenshell.api.run("group.add_group", self.file, Name="Unit 1A")
+        group = ifcopenshell.api.run("group.add_group", self.file, name="Unit 1A")
         ifcopenshell.api.run("group.assign_group", self.file, products=[element], group=group)
         ifcopenshell.api.run("root.remove_product", self.file, product=element)
         assert not self.file.by_type("IfcRelAssignsToGroup")
diff --git a/src/ifcopenshell-python/test/api/test_api.py b/src/ifcopenshell-python/test/api/test_api.py
index 00d33b8b8a..40e2135127 100644
--- a/src/ifcopenshell-python/test/api/test_api.py
+++ b/src/ifcopenshell-python/test/api/test_api.py
@@ -348,3 +348,14 @@ class TestTemporarySupportForDeprecatedAPIArguments(test.bootstrap.IFC4):
         )
         assert get_context(element_type) == None
         assert len(self.file.by_type("IfcRelDeclares")) == 0
+
+    @deprecation_check
+    def test_add_group(self):
+        group = ifcopenshell.api.run("group.add_group", self.file, Name="Name", Description="Description")
+        assert group.Name == "Name"
+        assert group.Description == "Description"
+
+    @deprecation_check
+    def test_add_layer(self):
+        layer = ifcopenshell.api.run("layer.add_layer", self.file, Name="Name")
+        assert layer.Name == "Name"