William I of Sicily

William I
King of Sicily
Reign	26 February 1154 – 7 May 1166
Predecessor	Roger II
Successor	William II
Born	1120 or 1121 Palermo, Kingdom of Sicily
Died	May 7, 1166 Palermo, Kingdom of Sicily
Burial	Monreale Cathedral
Spouse	Margaret of Navarre ​ (m. 1149)​
Issue	Roger IV, Duke of Apulia Robert III, Prince of Capua William II Henry, Prince of Capua
House	Hauteville
Father	Roger II of Sicily
Mother	Elvira of Castile

William I (1120 or 1121 – May 7, 1166), called the Bad or the Wicked (Sicilian: Gugghiermu lu Malu), was the second king of Sicily, ruling from his father's death in 1154 to his own in 1166. He was the fourth son of Roger II and Elvira of Castile.

William's title "the Bad" seems little merited and expresses the bias of the historian Hugo Falcandus and the baronial class against the king and the official class by whom he was guided.^[1]