Marguerite de Navarre
Jeanne d'Angoulême, Countess of Bar-sur-Seine (c. 1490 – after 1531/1538), "Dame de Givry", "Baroness of Pagny and of Mirebeau", was an illegitimate half-sister of King Francis I of France and princess Marguerite de Navarre. She was created "suo jure" Countess of Bar-sur-Seine in 1522. She was the wife of Jean de Longwy, Seigneur of Givry, Baron of Pagny and of Mirebeau.