William Barlais
William or Guillaume Barlais was a Lord of Beirut in the Kingdom of Jerusalem, via his marriage to Isabella of Beirut in 1277 - he was her fourth and final husband. They died childless and she had no children from her previous three marriages to Hugh [II of Cyprus], Hamo [le Strange] and Nicolas l’Aleman - the Lordship of Beirut thus passed to her sister Eschiva of [Ibelin (died 1312)|Eschiva of Ibelin] and her husband Humphrey of Montfort, Lord of Tyre.