Guillaume III, D' AVESNES, COUNT O HAINAULT
He married Jeanne de Valois, Countes-Hainault 19 May 1305 at Chanay, Ain, France . Jeanne de Valois, Countes-Hainault was born at of Fontainebelau, Seine-et-Marne, France Abt 1294 daughter of Charles I, Prince of France, Count de Valois and Marguerite, Princess of Sicily .
They were the parents of 10
children:
Sibylla, Countess of Holland
born 1310.
Margaretha, Countess of Holland
born 1311.
Jan, Count of Holland
born Abt 1313.
Philippa, Countess of Hainault or Holland
born Abt 1314.
Johanna, Countess of Holland
born Abt 1315.
Willem IV, Count of Holland
born Abt 1317.
Agnes, Countess of Holland
born Abt 1320.
Elisabeth (Isabella) , Countess of Holland
born Abt 1323.
Louis, Count of Holland
born Abt 1325.
Elisabeth, Countess of Holland
born Abt 1327.
Guillaume III, D' Avesnes, Count o Hainault died 7 Jun 1337 at Valenciennes, Nord, France .
Jeanne de Valois, Countes-Hainault died 7 Mar 1342/52 at Fontenelle, Yonne, France .