Matilda or Maud FitzRoy may refer to: Matilda FitzRoy, Duchess of Brittany, illegitimate daughter of Henry I of England by unnamed mistress Matilda FitzRoy, Countess of Perche, illegitimate daughter of Henry I of England by Edith Matilda FitzRoy, Abbess of Montivilliers, illegitimate daughter of Henry I of England by Isabel de Beaumont Constance/Maud FitzRoy, Viscountess de Beaumont, illegitimate daughter of Henry I of England by unnamed mistress