{{Short description|Lord of Beirut in the Kingdom of Jerusalem}}{{Infobox nobility|name=William Barlais|title=Lord of Beirut|noble family=Barlais|spouse=Isabella, Lady of Beirut<br>Alice of Mandelée|father=Amalrich 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 and her husband Humphrey of Montfort, Lord of Tyre.
==Life== His lineage is unknown, although he may be identifiable with the William Barlais who was son of Amalrich Barlais.<ref>Du Cange: ''Les Familles d'outre-mer.'' 1869, [https://www.digitale-sammlungen.de/de/view/bsb10619623?page=531 S. 519].</ref> After Isabella's death, he remarried to Alice, daughter of William of Mandelée, Lord of Scandaleon - on William Barlais' death, Alice remarried to Ague of Bethsan.
== References == <references/>
== Bibliography == * Europäische Stammtafeln, Band III, Tafel 564, 631 * Charles du Cange: ''Les Familles d'outre-mer.'' Publiées par Emmanuel Guillaume-Rey. Imprimerie Impériale, Paris 1869.
== External links == {{Royalty-stub}} category:14th-century deaths category:13th-century births category:Christians of the Crusades Category:Remarried jure uxoris officeholders Category:Jure uxoris lords