Eustace III of BoulogneEustace III
, was a count of Boulogne
, successor to his father
He went on crusade in 1096, 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 1150 it was given to their son, Eustace IV.