See also
| Husband: | Otto of MONTFERRAT (c. 965-991) | |
| Wife: | Gerberga of ITALY (945- ) | |
| Children: | William III + of MONTFERRAT (970-1041) | |
| Riprando of MONTFERRAT (c. 972- ) | ||
| Otta of MONTFERRAT (c. 974- ) | ||
| Waldrada of MONTFERRAT (c. 976- ) | ||
| Name: | Otto of MONTFERRAT | |
| Sex: | Male | |
| Father: | Alerum + of MONTFERRAT (c. 960-967) | |
| Mother: | Gerberga of ITALY (945- ) | |
| Birth | 0965 (est) | Italy |
| Occupation | Margrave of Montferrat | |
| Title | Margrave of Montferrat | |
| Death | 0991 (age 25-26) | |
| Name: | Gerberga of ITALY | |
| Sex: | Female | |
| Father: | Berenger II + (919- ) | |
| Mother: | Willa + of TUSCANY (924- ) | |
| Birth | 0945 | Italy |
| Name: | William III + of MONTFERRAT | |
| Sex: | Male | |
| Spouse: | Waza + (915- ) | |
| Birth | 0970 | Montferrat, Piedmont, Italy |
| Occupation | Margrave of Montferrat | |
| Title | frm 0991 to 1042 (age 20-72) | Margrave of Montferrat |
| Death | 1041 (age 70-71) | |
| Name: | Riprando of MONTFERRAT | |
| Sex: | Male | |
| Birth | 0972 (est) | |
| Name: | Otta of MONTFERRAT | |
| Sex: | Female | |
| Birth | 0974 (est) | |
| Name: | Waldrada of MONTFERRAT | |
| Sex: | Female | |
| Birth | 0976 (est) | |
Otto I (also Otho or Ottone) (died 991) was the Margrave of Montferrat briefly following his father Aleram on the throne.
Otto was the son of Aleram and his first wife. Notably obscure, he did not appear with his parents and his younger brother Anselm at the foundation of the monstery of Grazzano in 961. On Aleram's death in 967, the great marca Aleramica was broken up: Montferrat went to Otto and Liguria to Anselm. Their elder brother William II had already deceased.
In his own lifetime, Otto does not appear in any document with the margravial title, but he appears in the documents of later generations cited as such. He appears in a confirmation of the possessions of the abbacy of Fruttuaria with the title in a patronymic. He probably never used the title in life, but his descendents retroactively applied it to him, as he held the same post as they.
Otto died in 991, as known by the foundation act of his son for the monastery of Spigno, which Otto himself had planned on building.[1] By his unnamed wife, he left two sons: an eldest named William, who succeeded him, and younger named Riprando. He also left two daughters, Otta and Waldrada (Gualderada).