Nielsen Hayden genealogy
Family: Guy de Thouars / Constance of Brittany (F10577)
m. Bef Oct 1199-
Father | Male
Guy de Thouars
Born Abt 1155 Died 13 Apr 1213 Chemillé, France 
Buried Married Bef Oct 1199 [1] Father Geoffroi V | F10586 Group Sheet Mother Aumur | F10586 Group Sheet
Mother | Female
Constance of Brittany
Born Abt 1162 Died 4 Sep 1201 Nantes, France 
Buried Father Conan IV | F10579 Group Sheet Mother Margaret of Huntingdon | F10579 Group Sheet
Child 1 | Female
+ Alix de Thouars
Born 1201 Died 21 Oct 1221 Buried Convent of the Cordeliers, Nantes, France 
Spouse Pierre de Braine | F10576 Married Mar 1213
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.