グリエルモ2世
Born in the small village of Celico near Cosenza, in Calabria (at the time part of the Kingdom of Sicily), Joachim was the son of Mauro de Celico, a well-placed notary, and of Gemma, his wife. He was educated at Cosenza, where he became first a clerk in the courts, and then a notary himself. In 1166–1167 he worked for Stephen du Perche, archbishop of Palermo (c. 1167–1168) and counsellor of Margaret of Navarre, regent for the young William II of Sicily.