Balian's descendants were among the most powerful nobles in the Kingdom of Jerusalem and the
Kingdom of Cyprus. Balian's first son
John, Old Lord of Beirut, was the leader of the opposition to
Emperor Frederick II when the latter tried to impose imperial authority over the
crusader states. The family briefly regained control of the castle of Ibelin in 1241 in the aftermath of Frederick's
Sixth Crusade, when certain territories were returned to the Christians by treaty. John had numerous children with
Melisende of Arsuf, including Balian, lord of
Beirut; Baldwin, seneschal of Cyprus; another John, lord of
Arsuf and constable of Jerusalem; and Guy, constable of Cyprus. This Balian was married to Eschiva of Montbéliard and was the father of John II of Beirut, who married the daughter of Duke
Guy I of Athens. John of Arsuf was the father of Balian of Arsuf, who married
Plaisance of Antioch. Guy the constable was the father of Isabella, who married
Hugh III of Cyprus. Balian of Ibelin's second son Philip was
regent of Cyprus while his niece, the widowed
Queen Alice, needed help to govern. With Alice of Montbéliard, Philip was the father of
John of Ibelin, count of Jaffa and Ascalon, regent of Jerusalem, and author of the
Assizes of the
High Court of Jerusalem, the most important legal document from the crusader kingdom. John married Maria, sister of
Hethum I of Armenia, and was the father of
James, count of Jaffa and Ascalon and also a noted jurist; and of Guy, count of Jaffa and Ascalon and husband of his cousin Maria, Hethum's daughter. Several members of the family went to the new kingdom of Cyprus at the beginning of the 13th century. Most of the rest moved there as the mainland kingdom was lost piece by piece. No members of the Ibelin family seems to have gone to any other country during this period. At this time, some of the
Embriaco lords of Gibelet, relatives of the Ibelins, also took the name
Ibelin because of their common maternal descent. Despite the family's modest origins on the paternal side, the Ibelins during the 13th–15th centuries were among the highest nobility in the Kingdom of Cyprus, producing brides for younger sons, grandsons and brothers of kings (though the kings and eldest sons tended to find more royal wives). Ibelins lived among the highest circles of Cyprus, and married into the royal family, the
Lusignans, and among such families as Montfort, Dampierre, ducal Brunswick, Montbeliard, and Gibelet(-Ibelins). They married also into other branches of Ibelins. They also had loftier ancestors: Maria Comnena was from the
Byzantine imperial
Comnenus dynasty, and was descended from the kings of
Georgia,
Bulgaria, ancient
Armenia,
Parthia,
Persia and
Syria. When the Kingdom of Cyprus was destroyed in the 15th century, the Ibelins apparently also lost their lands and positions, and the family possibly became extinct. ==Lords of Ibelin==