Othon was born about 1035, the son of Ottone II di Monferrato and Berthe de Turin. The place is not known.
He died in 1084. The place is not known.
His wife was Hélène de Vintimille, who he married in 1064. The place has not been found. Their only known child was Boniface I (1070-1125).
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Othon III de Montferrat |
Ottone II di Monferrato |
Guglielmo III di Monferrato |
Ottone I di Monferrato |
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Berthe de Turin |
Oldéric-Manfred II d'Oriate |
Manfred d'Oriate |
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Prangarde de Modene-Reggio |
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Berthe de Toscane |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | ABT 1035 |
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| Death | 1084 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | marquis de Montferrat et del Vasto |