Eustace IV (c. 1129/1131 – 17 August 1153) ruled the County of Boulogne from 1146 until his death. He was the eldest son of King Stephen of England and Countess Matilda I of Boulogne.[2] When his father seized the English throne on Henry I's death in 1135, he became heir apparent to the English throne but predeceased his father.
References
- ↑ 1.0 1.1 Heather J. Tanner, Eleanor of Aquitaine: Lord and Lady, ed. B. Wheeler, John C. Parsons, (Palgrave Macmillan, 2002), 153.
- ↑ Edmund King, Eustace, count of Boulogne, Oxford Online Dictionary of National Biography, 2004