Gilbert, Count of Brionne

Gilbert (or Giselbert) de Brionne, Count of Eu and of Brionne (c. 1000 – c. 1040), was an influential nobleman in the Duchy of Normandy in Northern France. He was one of the early guardians of Duke William II in his minority, and a first cousin to William's father Duke Robert. Had Lord Brionne not been murdered, the senior house of de Clare would probably have been titled de Brionne. Lord Brionne was the first to be known by the cognomen Crispin because of his hair style which stood up like the branches of a pine tree.