William of Ypres was a Flemish nobleman and one of the first mercenary captains of the Middle Ages. Following two unsuccessful bids for the County of Flanders, William became King Stephen of England's chief lieutenant during the civil war of 1139–54 known as the Anarchy. He held Kent, though not the title of earl, until the early years of King Henry II's reign, when he returned to Flanders.
- Occupation
- feudatory
- Citizenship
- Kingdom of England
- Born
- 1090
- Died
- January 24, 1164, 1160
