
It became apparent in late 1184 or early 1185 that Baldwin IV was dying. Baldwin V was acclaimed, crowned, and anointed in the Church of the Holy Sepulchre on 20 November 1183, and he received homage from all the barons except his stepfather, Guy. As the boy had the next best claim after his mother, Agnes's proposal was widely accepted. Agnes may have acted to foil the ambitions of Raymond of Tripoli, who also had a claim to the throne. Agnes of Courtenay, mother of Sibylla and Baldwin IV, suggested that Sibylla's son should be made co-king.

Sibylla's supporters were not present, while her and Baldwin IV's younger half-sister Isabella and Isabella's husband, Humphrey IV of Toron, were not viable candidates due to being besieged in Kerak by the Egyptian ruler Saladin. In 1183 Baldwin IV summoned a council to discuss who would be an acceptable alternative to Guy.

Kingship īaldwin IV on his sickbed and Baldwin V crowned, as depicted in William of Tyre's manuscripts Baldwin IV initially intended Guy to become the next king, but soon Baldwin IV realized that his brother-in-law's unpopularity with the barons of the Kingdom of Jerusalem and rulers of the neighbouring Crusader states, Prince Bohemond III of Antioch and Count Raymond III of Tripoli, made him a poor candidate. īaldwin IV chose Guy of Lusignan as his new brother-in-law in early 1180. Her son, Baldwin of Montferrat, followed her in the line of succession. By July 1178, the king recognized his sister as his new heir presumptive.

William had thus been expected to succeed him. Though only 16, the king was not expected to live long, nor could he marry and have children, because he had contracted leprosy and was growing weaker. His father, William of Montferrat, had died in June 1177. Baldwin of Montferrat was born in December 1177 or January 1178 to Sibylla, sister of King Baldwin IV of Jerusalem, after whom he was named.
