EUSTACE I., a son of Count Baldwin II., held the county from 1046 until his death in 1049.
His son, EUSTACE II. (d. Io93), count of Boulogne, was the husband of Goda, daughter of the English king Aethelred the Unready, and aunt of Edward the Confessor. Eustace paid a visit to England in Io51, and was honourably received at the Con fessor's court. A brawl in which he and his servants became in volved with the citizens of Dover led to a serious quarrel between the king and Earl Godwin. The latter, to whose jurisdiction the men of Dover were subject, refused to punish them. His con tumacy was made the excuse for the outlawry of himself and his family. In io66 Eustace came to England with Duke William, and fought at the battle of Hastings. In the following year, prob ably because he was dissatisfied with his share of the spoil, he as sisted the Kentishmen in an attempt to seize Dover Castle. The conspiracy failed, and Eustace was sentenced to forfeit his Eng lish fiefs. Subsequently he was reconciled to the Conqueror, who restored a part of the confiscated lands.
Eustace died in Io93, and was succeeded by his son, EUSTACE III., who went on crusade in Io96, and died about 1125. On his death the county of Boulogne came to his daughter, Matilda, and her husband Stephen, count of Blois, afterwards king of England, and in I1so it was given to their son, Eustace IV.