Family: Guy Baillistre de Thouars Duke de Bretagne / Constance of Brittany Penthievre

Paternal line Guy Baillistre de Thouars Duke de Bretagne

No parents are registered.

Paternal line Constance of Brittany Penthievre
Conan II 'Le Petit' 'The Small' Count de Penthievre Duke Bretagne 1138 - 1171  (33 years)	_	Margaret Marjorie Huntingdon Princess Scotland 1148 - 1201  (53 years)
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Alan "The Black" de Brittany (maid. name - 1st Earl of Richmond) 1096 - 1146  (50 years)	_	Bertha Heiress Of Brittany 1114 - 1167  (53 years)
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Stephen I (Etienne) de Brittany (maid. name - Count of Treguier) 1064 - 1136  (72 years)	_	Hawise de Guingamp 1064 - 1135  (70 years)