Mon arbre généalogique

Act of William I de Semilly in favour of the abbey of Aunay, to endow prayers for the souls of his wives Juliana and Melisende (early 13th century). Caen, AD Calvados, H 958 (reproduced by permission of the Archives du Calvados).

William I de Semilly inherited many of the Hommet and Say lands in England and Normandy from his father Enguerrand I du Hommet, a younger son of Richard I du Hommet and Agnes de Say; he also received the Semilly inheritance from his mother Cecilia, daughter of William de Semilly, taking the surname of Semilly in their honour. Although he lost his English lands in 1204, he later recovered them, and his son William II de Semilly fought for King John during the Magna Carta civil war and held English lands off and on until his death in c.1242.