William III (c. 970 – 1042) was the third Marquis of Montferrat and Count of Vado from 991 to his death. He was the eldest son and successor of Otto I. William I and II were the father and son, respectively, of Aleram, the first Marquis, but neither served as Marquis himself.
William III, Marquis of Montferrat | |
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Marquis of Montferrat | |
Reign | 991 – 1042 |
Predecessor | Otto I |
Successor | Otto II |
Born | c. 972 |
Died | 1042 | (aged 69–70)
Spouse | Waza |
Issue | Otto II Henry |
House | Aleramici |
Father | Otto I |