Mathilde, dame de Béthune

Family

In June 1246 he married Matilda of Bethune (d. November 8, 1264), daughter of Robert VII, Lord of Bethune, and had the following children:

Marie (d. 1297), married with Willem V of Gulik (d. 1278) she have a son, William of Jülich. Married in 1285 Simon II de Chateauvillain (d. 1305), Lord of Bremur

Robert III of Flanders (1249–1322)

William (aft. 1249 – 1311), Lord of Dendermonde and Crevecouer, married in 1286 Alix of Beaumont and had issue

John (1250 – October 4, 1290), Bishop of Metz and Bishop of Liège

Baldwin (1252–1296)

Margaret (c. 1253 – July 3, 1285), married in 1273 John I, Duke of Brabant

Beatrix (c. 1260 – April 5, 1291), married c. 1270 Floris V, Count of Holland

Philip (c. 1263 – November 1318), Count of Teano, married Mahaut de Courtenay, Countess of Chieti (d. 1303), married c. 1304 Philipotte of Milly (d. c. 1335), no issue