Robert de Grey assumed the name of Marmion, m. Lora, dau. andco-heir of Herbert de St. Quentin, and had an only dau. andheiress, Elizabeth Marmion who m. Henry, Lord Fitz-Hugh, K.G.[Sir Bernard Burke, Dormant, Abeyant, Forfeited and ExtinctPeerages, Burke's Peerage, Ltd., London, England, 1883, p. 356,Marmyon, or Marmion, Barons Marmion of Wetrington, co. Lincoln]