diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87a4f8d6..05f06979 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Tree Plot: Plot tree using matplotlib library, added matplotlib as optional dependency.
 - BaseNode: Add plot method.
 ### Changed:
+- Misc: Rename assertion function.
 - Misc: Optional dependencies imported as MagicMock
 
 ## [0.20.1] - 2024-08-24
diff --git a/bigtree/dag/construct.py b/bigtree/dag/construct.py
index 060fc089..edaa0bd9 100644
--- a/bigtree/dag/construct.py
+++ b/bigtree/dag/construct.py
@@ -6,8 +6,8 @@
 from bigtree.utils.assertions import (
     assert_dataframe_no_duplicate_attribute,
     assert_dataframe_not_empty,
-    assert_key_not_in_dict_or_df,
     assert_length_not_empty,
+    assert_not_reserved_keywords,
     filter_attributes,
     isnull,
 )
@@ -109,7 +109,7 @@ def dict_to_dag(
         parent_names: List[str] = []
         if parent_key in node_attrs:
             parent_names = node_attrs.pop(parent_key)
-        assert_key_not_in_dict_or_df(node_attrs, ["parent", "parents", "children"])
+        assert_not_reserved_keywords(node_attrs, ["parent", "parents", "children"])
 
         if child_name in node_dict:
             child_node = node_dict[child_name]
@@ -194,7 +194,7 @@ def dataframe_to_dag(
         attribute_cols = list(data.columns)
         attribute_cols.remove(child_col)
         attribute_cols.remove(parent_col)
-    assert_key_not_in_dict_or_df(attribute_cols, ["parent", "parents", "children"])
+    assert_not_reserved_keywords(attribute_cols, ["parent", "parents", "children"])
 
     data = data[[child_col, parent_col] + attribute_cols].copy()
 
diff --git a/bigtree/utils/assertions.py b/bigtree/utils/assertions.py
index a6ca31f2..ba68a339 100644
--- a/bigtree/utils/assertions.py
+++ b/bigtree/utils/assertions.py
@@ -26,6 +26,7 @@
 __all__ = [
     "assert_style_in_dict",
     "assert_str_in_list",
+    "assert_not_reserved_keywords",
     "assert_key_in_dict",
     "assert_length_not_empty",
     "assert_dataframe_not_empty",
@@ -71,18 +72,18 @@ def assert_str_in_list(
         )
 
 
-def assert_key_not_in_dict_or_df(
-    parameter_dict: Union[Dict[str, Any], pd.DataFrame],
-    not_accepted_parameters: List[str],
+def assert_not_reserved_keywords(
+    parameter_dict_or_df: Union[Dict[str, Any], pd.DataFrame],
+    reserved_keywords: List[str],
 ) -> None:
     """Raise ValueError is parameter is in key of dictionary
 
     Args:
-        parameter_dict (Dict[str, Any]/pd.DataFrame): argument input for parameter
-        not_accepted_parameters (List[str]): list of not accepted parameters
+        parameter_dict_or_df (Dict[str, Any]/pd.DataFrame): argument input for parameter
+        reserved_keywords (List[str]): list of not accepted parameters
     """
-    for parameter in parameter_dict:
-        if parameter in not_accepted_parameters:
+    for parameter in parameter_dict_or_df:
+        if parameter in reserved_keywords:
             raise ValueError(
                 f"Invalid input, check `{parameter}` is not a valid key as it is a reserved keyword"
             )