Berengar II of Italy
Guy (or Guido) (940 – 25 June 965) was the margrave of Ivrea from 950 to his death. In 950, his father, King Berengar II of Italy, appointed him to rule in the familial margraviate. His mother was Willa of Tuscany, his elder brother was Adalbert II, co-king with their father, and their younger brother was Conrad.