William of Bellême

[a][2] With the consent of Richard I, Duke of Normandy William had constructed two castles, one at Alençon and the other at Domfront, while the caput of Yves' lordship was the castle of Bellême, constructed "a quarter of a league from the old dungeon of Bellême" in Maine.

[6] His brother Avesgaud, Bishop of Le Mans was engaged in constant warfare with Herbert I, Count of Maine.

William joined forces with his brother Avesgaud attacking count Herbert at the castle of Ballon.

[b][8] In 1027 when Robert I, Duke of Normandy succeeded his brother Richard III, William de Bellême revolted against him.

Robert laid siege to his castle of Bellême until William surrendered then had to humbly ask for forgiveness (in bare feet with a saddle on his shoulders).