and
Ascalon in the south of the kingdom. William's marriage to Sibylla, who was then aged around 17, was celebrated in November 1176, six weeks after his arrival. The couple received the County of Jaffa and Ascalon, which had belonged to Sibylla and Baldwin's father,
Amalric, before he became king; this may have marked the couple as heirs to the throne. Archbishop William of Tyre describes Count William as brave, generous, honest, and unpretentious, qualities which Hamilton notes were admired in the 12th-century nobility; but also quick-tempered, gluttonous, and a heavy drinker (though "this did not impair his judgement"), traits undesirable in a king of Jerusalem. In a chronicle written in the late 12th and early 13th century, the cleric
Tolosanus of Faenza commended William's appearance, integrity, sexual restraint, and faithfulness to his wife. Tolosanus called Sibylla
Beneesente, meaning "benevolent" or "well-disposed"; Nicholson interprets this as possibly William's pet name for Sibylla. According to Bishop
Sicard of Cremona, King Baldwin offered to
relinquish the throne to William, but William refused. Hamilton considers this possible: Baldwin knew he had leprosy and had found a suitable successor, but William was wary of the opposition he faced. Sicard also narrates that William held the whole kingdom in his care, a claim which Hamilton finds unsubstantiated. At most, Hamilton argues, William could have expected to deputise for the king if the king became too ill to rule. Haberstumpf, on the other hand, accepts the narrative in
Benvenuto di Sangiorgio's 15th-century
Chronicle of Montferrat, according to which William and Sibylla exercised royal power in Jerusalem. According to Haberstumpf, the stories of William's parents and brother
Renier coming on pilgrimage and assisting him in the government and William taking action against the Egyptian ruler
Saladin are, respectively, "a late invention of Piedmontese chroniclers" and "almost certainly false". Jaffa and Ascalon were detached from the
royal domain to be Sibylla's
dowry and her
fief; although he bore the comital title, William was not count in his own right but rather administered the fief
on behalf of his wife. The prosperous county gave the couple considerable power and influence within the kingdom. Under William and Sibylla, the long title "count of Jaffa and Ascalon" first appears, but William was also known to contemporaries simply as the "count of Jaffa". No more than three documents issued by William as count survive; two of these mention Sibylla's consent. These were the grant of land (with Sibylla's consent) to the
monastery of St. Mary and the Holy Spirit on Mount Sion near Jerusalem; a confirmation of King Baldwin's agreement with the
canons of the Holy Sepulchre (in which case he may have acted as the designated heir); and the agreement (with Sibylla) to a
charter by which the king confirmed
Raynald of Châtillon and
Stephanie of Milly's donation of land to the new military-religious
Order of Mountjoy. Nicholson concludes that William and Raynald cooperated efficiently and hoped that the order would help them defend their lands against the
Muslims to the south. ==Death and aftermath==