The St. John Genealogy Project
Origin and Ancestry DNA Database & Electronic Archive
1005 - 1080 (75 years) 
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| Name | Bertha verch Odo de Blois | |
| Suffix | Duchess consort of Brittany & countess consort of Maine | |
| Birth | 999-1005 | Brittany, France  |
| Gender | Female | |
| Death | abt. 1080 | |
| Person ID | I105554985 | St. John Origin and Ancestry DNA Database | St. John Generation One - Raoul de Sancto Johanne |
| Last Modified | 12 Feb 2021 | |
| Father | King Odo II de Blois, Count of Champagne, b. 983 d. 1037 (Age 54 years) | |
| Relationship | Birth | |
| Father | Maud of Normandy, b. bef. 982 d. 1006 (Age 24 years) | |
| Family ID | F400013 | Group Sheet | Family Chart |
| Family 1 | Alan III de Rennes, of Brittany, b. 997 d. 1 Oct 1040 (Age 43 years) | |||||||||
| Marriage | 1018 | France [1] |
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| Family ID | F400012 | Group Sheet | Family Chart | ||||||||
| Last Modified | 27 May 2021 | |||||||||
| Family 2 | Hugh IV, Count of Maine, b. abt. 1020 d. 25 Mar 1051 (Age 31 years) | |||||
| Marriage | 1046 | France |
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| Family ID | F400173 | Group Sheet | Family Chart | ||||
| Last Modified | 12 Feb 2021 | |||||
| Heraldry |  | Media (Log in) |
| Reference | Suzanne St. John. "Bertha verch Odo de Blois, Duchess consort of Brittany & countess consort of Maine". The St. John Genealogy Project. https://stjohngenealogy.com/getperson.php?personID=I105554985&tree=OSA0001 (accessed April 24, 2025). |
| Sources |  Sources (Log in) |
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