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Eustace II, (c. 1015 – c. 1087), also known as Eustace aux Grenons ("Eustace with long moustaches"), was Count of Boulogne from 1049 to 1087. He fought on the Norman side at the Battle of Hastings, and afterwards received large grants of land forming the Honour of Boulogne in England. He is one of the few proven companions of William the Conqueror. It has been suggested that Eustace was the patron of the Bayeux Tapestry. His second son Godfrey of Bouillon was a preeminent leader of the First Crusade, and the first ruler of the Kingdom of Jerusalem.