The House of Ibelin was a noble family in the Crusader Kingdom of Jerusalem in the 12th century. They rose from humble beginnings to become one of the most important families in the kingdom, holding various high offices and with extensive holdings in the Holy Land and Cyprus. The family disappeared after the fall of the kingdom of Cyprus in the 15th century.
The family took their name from the castle of Ibelin, which was built in 1141 by King Fulk I and entrusted to Barisan, the founder of the family. "Ibelin" was the crusader's name for the Arab city of Yibna, where the castle was situated. The castle fell to the Saracens at the end of the 12th century, but by then the family had holdings at Beirut and in Cyprus.
The Ibelin family rose from relatively humble origins to become one of the most important noble families in the Crusader states of Jerusalem and Cyprus. The family claimed to be descended from the Le Puiset viscounts of Chartres, but this appears to be a later fabrication. They were more probably from Pisa, Italy, the name 'Barisan' being found in Tuscany and Liguria related to the Azzopardi family. Its first known member, Barisan of Ibelin, was apparently a knight in service of the Count of Jaffa and in the 1110s became constable of Jaffa. As reward for his capable and loyal service, around 1122 he married Helvis, heiress of the nearby lordship of Ramla.
Barisan was given the castle of Ibelin in 1141 by King Fulk as a reward for his loyalty during the revolt of his then master Hugh II of Le Puiset, Count of Jaffa, in 1134. Ibelin was part of the County of Jaffa, which was annexed to the royal domain after Hugh's unsuccessful revolt. Barisan's marriage with Helvis produced Hugh, Baldwin, Barisan, Ermengarde, and Stephanie. The younger Barisan came to be known as Balian. Along with Ibelin, the family then held Ramla (inherited from Helvis), and the youngest son Balian received the lordship of Nablus when he married Maria Comnena, the Dowager Queen. Balian was the last to hold these territories as they all fell to Saladin in 1187.