Matilda FitzRoy, Duchess of Brittany

Maud or Matilda Fitzroy was a duchess consort of Brittany by her marriage to Conan III, Duke of Brittany. She was an illegitimate daughter of Henry I of England by one of his unknown mistresses.

Duchess consort of Brittany

Matilda married, before 1113, Conan III, Duke of Brittany, and had:

Hoel – disinherited from the Ducal crown; Count of Nantes;
Bertha – married Alan of Penthièvre; upon Alan's death in 1146, she returned to Brittany.
Constance – married Sir Geoffroy II, Sire de Mayenne, son of Juhel II, Seigneur de Mayenne.