Sicily - 1154-1166 - 1 Foilaro - William I of Sicily, called "the Bad," ruled from 1154 to 1166, navigating baronial conspiracies and maintaining the Norman kingdom’s stability.Early Life and AscensionWilliam I (1120 or 1121 – 7 May 1166) was the fourth son of Roger II of Sicily and Elvira of Castile, initially with little expectation of ruling due to the presence of older brothers. The deaths of his three elder brothers between 1138 and 1148 unexpectedly made him heir apparent. He was associated with kingship in 1151 and formally crowned king after his father’s death on Easter Sunday, 4 April 1154, in Palermo Cathedral, ensuring continuity of the Hauteville dynasty over Sicily, southern Italy, and residual North African territories