Matilda FitzRoy Duchess of Brittany

✓ Matilda, illegitimate da. of Henry I of England by an unknown mistress; m. (1112 or before) Conan III, Duke of Brittany; mother of Berthe, Duchess of Brittany (and so grandmother of Conan IV). In 1168 Eudes de Porhoet, Berthe's second husband, complained that Henry II had seduced their daughter 'incestuously; for the king and Eudo's wife were the offspring of two sisters' - the Empress Matilda and this Matilda, both daughters of Henry I. RING into Henry I (I99585). Source: Medieval Lands (fmg.ac, Cawley), 'Brittany Dukes' and 'Brittany Nobility - Nantes, Porhoet, Rennes' (Eudes II de Porhoet), read 2 Nov 2026. [DIRECT ANCESTOR OF THE COMPILER: flag added 2 Nov 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]