Eustace IV, Count of Boulogne Eustace IV, Count of Boulogne Eustace IV (c. 1127–1135 – 17 August 1153), Count of Boulogne, 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. Upon his mother's death in 1152 he inherited the county of Boulogne and other estates. Eustace was first mentioned in one of his parents' charters dated no later than August 1131. As heir to the English throne in 1137, he did homage for Normandy to Louis VII of
Style of the British sovereign the Almighty to the Throne of the whole Kingdom of Britain". In Scotland the preferred title of the monarch was "King/Queen of Scots" rather than "of Scotland" (although the latter was by no means unknown). William I, the first Norman monarch of England, used the simple "King of the English". His successor, William II, was the first consistently to use "by the Grace of God". Henry I added "Duke of the Normans" in 1121, though he had seized Normandy from his brother Robert in 1106. In 1152 Henry II acquired many further French possessions through his marriage to Eleanor of