Lucy married Sir William Devereux, 1st Baron Deverois of Lyonshall, son of Sir William Devereux of Lyonshall and Maud (Matilda) de Giffard. (Sir William Devereux was born about 1240 in Lyonshall, Kington, Herefordshire, England and died in 1314 in Holme Lacy, Hereford, Herefordshire, England.)