According to http://hallfamilyname.com (Wanda Ware DeGidio) Ansfrid was the natural son of Hugh the Great and Gerlotte (c913-c937), daughter of Theobold de Blois and Richilde of Borges. During this time Gerlotte was wed to Thurstan, son of Drogo. Hugh was determined to be the father of Ansfrid based on Hugh's rare DNA (G2A) matching descendants of Ansfrid le Goz. Also, Gerlotte had a close relationship with Hugh the Great due to her father being a casual or knight.