Eustace IV, Count of Boulogne
Heir apparent of King Stephen of England (died 1153) · Lived 1130 to 1153 · aged 23
Eustace IV 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. 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.
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Meeting of Stephen and Prince Henry at Wallingford (Cassell's Illustrated History of England, 1865), depicting the Treaty of Wallingford, 1153. Eustace, then in his early 20s, is standing at left, his arm resting on his shield, his father next to him. Opposite them is the 20-year-old Henry FitzEmpress.