John of Ibelin, Count of Jaffa

John of Ibelin (1215–1266), count of Jaffa and Ascalon, was the son of Philip of Ibelin, bailli of Cyprus, and Alice of Montbéliard. He fled Cyprus in 1229 after Frederick II seized the Ibelin fiefs, and fought at Casal Imbert in 1232.

Around 1240 he married Maria of Barbaron, sister of Armenia's King Hethum I, and helped take Tyre in 1242. He became count of Jaffa in 1246, joined Louis IX’s crusade at the taking of Damietta in 1249, and as bailli of Jerusalem repulsed an Egyptian attack on Jaffa.

In the War of Saint Sabas he backed Venice. He wrote the Livre des assises de Jérusalem, the crusader kingdom’s longest surviving legal treatise, and died in 1266.