Otto II (also Otho, Ottone, or Oddone) (c. 1015 – 20 November 1084) was the fourth Marquis of Montferrat from 1042 until his death. He was a member of the Aleramid dynasty.
| Otto II, Marquis of Montferrat | |
|---|---|
| Marquis of Montferrat | |
| Reign | 1042 – 20 November 1084 |
| Predecessor | William III |
| Successor | William IV |
| Born | c. 1015 |
| Died | 20 November 1084 (aged 68–69) |
| Spouse | Constance of Savoy |
| Issue | William IV Henry |
| House | Aleramici |
| Father | William III |
| Mother | Waza |