This disambiguation page lists articles associated with the same or a similar title.
This page lists rulers who carried the title of William II in English and others whose names have sometimes been anglicised as William II:
Guglielmo Il Buono ("William the Good") – last Norman King of Sicily (1154—1189) who is Guglielmo II if his father Guglielmo Il Malo ("William the Bad") is given as Guglielmo I.