Elizabeth de Montfort Parents Father: Piers de Montfort Mother: Maud de la Mare Family Spouse: William de Montagu Children: William de Montagu (1302–) m. Katherine de Grandison (–23 Apr 1349) · 1327 Children: Sibyl de Montagu; John de Montagu; William de Montagu (1328–1397) ← Surname index Father: Piers de MontfortMother: Maud de la Mare