John I, Count of Blois
John I of Châtillon, was count of Blois from 1241 to 1280 and lord of Avesnes. Wikipedia
Died: June 28, 1279, Chambord, France
Children: Joan, Countess of Blois
Great-grandparents: Guy II de Châtillon, Theobald V, Count of Blois, Alice of France, and more
Grandparents: Margaret, Countess of Blois, Walter III of Châtillon, Walter II of Avesnes, and more
Parents: Hugh I, Count of Blois and Mary, Countess of Blois
Spouse: Alix of Brittany, Dame de Pontarcy (m. 1254–1279)