Raymond III of Tripoli, first cousin of their father Amalric I of Jerusalem, had been "bailli" or regent for Baldwin IV while the latter was a child, but once the king came of age in 1176 his power began to recede. He had a claim to the throne in his own right, but his childlessness hindered him advancing it. Instead, he acted as a power-broker, and aided the interests of the Ibelin family. Before Baldwin was born, his father died of illness. Amalric's widow (Isabella's mother) Maria Comnena had married Balian of Ibelin, and Raymond attempted to regain influence with a project to marry Sibylla to Balian's older brother Baldwin of Ibelin. The king countered this by marrying her to Guy of Lusignan instead in 1180. Guy, as a vassal of the Angevins, from Poitou, had the potential to attract aid from Baldwin IV's cousin Henry II of England to the kingdom.