Guyomarch was born about 1045, the son of Alain de Léon but his mother is unknown. The place is not known.
He died in 1103 in Terre-Sainte.
His wife was Orwen de Cornouailles. They were married, but the date and place have not been found. Their two known children were Hervé I (c1060->1096) and Emme Anne (c1060-c1092).
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Guyomarch II de Léon |
Alain de Léon |
Morvan de Léon |
Guyomarch I de Léon |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | ABT 1045 |
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| Death | 1103 |
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