Robert De Beaufort 
Robert De was born about 1610. Robert De's father was Gilles De Beaufort and his mother is Suzanne De Fournel. His paternal grandparents are Romain De Beaufort and Madeleine De Schoonvliedt. He is an only child.General Notes
Seigneur Mondicourt, Montdies, Malmeron
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Genealogy of Lewis Carroll, Justin Swanstrom, The Royal Families of England Scotland & Wales by Burkes Peerage; Debrett's Peerage & Baronage; Table of descendants French Canadian Genealogical Society; Families of Monfort-sur-Risle & Bertrand de Bricquebec; The Dukes of Normandy, XXXXI, Paul Leportier, Claude Barret>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, S. Bontron <Brian Tompsett>, R. Dewkinandan, C. Donadello; Scevole de Livonniere, H. de la Villarmois) http://geneastar.org.
‌Robert De and Isabelle De were married in a religious ceremony in 1632. They have a son named Philippe Louis De.