William II of Sicily
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.