Genealogies had implications in not only domestic power struggles, but also across the Channel in connection with English claims in France. Assertions in the 15th century that English kings had a right to the French throne originated in Edward III’s status as the grandson of Philip IV of France (Edward was the son of Philip’s daughter, Isabella of France).
On the Canterbury Roll the French and English royal bloodlines are linked through the marriage of Isabella of France to Edward II of England.