Willem married Jeanne or Joan De VALOIS on 19 May 1305 in Longpont, Essonne, Ile-de-France, France. Jeanne (daughter of Charles I of FRANCE and Marguerite of SICILY NAPLES) was born in 1294 in Longpont, Aisne, Picardie, France; died on 07 Mar 1342 in Fontenelle, Yonne, Bourgogne, France. [Group Sheet] [Family Chart]

1. Willem DE AVESNES, III was born in 1286; died on 07 Jun 1337.
2. Sibylla Countess of HOLLAND was born in 1310 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died in in , Young, Texas, USA.
3. Margaretha Countess of HOLLAND was born in 1311 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died on 23 Jun 1356 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France.
4. Philippa of HAINAULT was born on 24 Jun 1311 in Valenciennes, Nord, Nord-Pas-de-Calais, France; died on 15 Aug 1369 in Windsor, Berkshire, , England.
5. Jan Count of HOLLAND was born in 1313 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died in 1316.
6. Johanna Countess of HOLLAND was born in 1315 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died in 1374.
7. Willem Iv Count of HOLLAND was born in 1317 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died on 26 Sep 1345 in Worms, , Friesland, Netherlands.
8. Agnaes Countess of HOLLAND was born in 1320 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died on 24 Nov 1327.
9. Louis Van HOLLAND was born in 1325 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died in 1328.
10. Elisabeth or Isabella Countess of HOLLAND was born in 1327 in Le Quesnoy, Nord, Nord-Pas-de-Calais, France; died on 30 Jan 1361 in , Young, Texas, USA.