
| Name | Constance | |
| Suffix | Duchess of Brittany | |
| Birth | Abt 1161 | Brittany, France |
| Gender | Female | |
| Death | 5 Sep 1201 | Nantes, Brittany, France |
| Burial | Villeneuve Abbey, Nantes, Brittany, France |
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| Person ID | I24129 | Coombs |
| Last Modified | 4 Oct 2014 | |
| Father | Conan IV, Count of Bretagne, b. Abt 1130, Brittany, France d. 20 Feb 1170–1171 (Age 41 years) | |
| Mother | Margaret, Duchess of Brittany, b. 1154, Northumberland, Northumberland, England d. 1201, Sawtrey Abbey, Cambridgeshire, England (Age 47 years) | |
| Marriage | 1159 OR 1160 | Of, , , Scotland |
| Family ID | F4278 | Group Sheet | Family Chart |
| Family | Guy, Viscount De Thouars, b. Abt 1155, Thouars, Poitou-Charentes, France d. 1213, Chemillé, Maine, France (Age 58 years) | |||||
| Marriage | 1199 | Angiers, Anjou, France |
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| Children |
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| Family ID | F8528 | Group Sheet | Family Chart | ||||
| Last Modified | 2 Feb 2026 | |||||