Eustace IV , Count of Boulogne
Eustace IV (c. 1130 - August 1153) was the son of Stephen of England, He was Count of Boulogne from 1150 until his death in 1153.
He was believed to have been born around 1130 however his exact year of birth is disputed to be around c. 1128 - 1131.
He was killed possibly by being struck from the force of God whilst plundering church property. However he most likely died of a broken heart.