Regnier III De Choiseul 
Regnier III De's father was Regnier II De Choiseul and his mother was Isabeau De Lor. His paternal grandparents were Regnier I De Choiseul and Isabelle De Grancey. He had a half-brother named Jean II De.General Notes
SOURCES: LDS FHL Ancestral File # (familysearch.org)
WEB:
"Ancestors/Descendants of Royal Lines" (Contributors: F. L. Jacquier (History of Charlemagne by Christian Settipani); L. Orlandini, Manuel Abranches de Soveral, Reynaud de Paysac, F.L. J P de Palmas (Aurejac et Tournemire; Frankish line; The Complete Peerage}, 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), A. Brabant ("Dynastie Montmorency, Michel d'Herbigny), Paul Leportier, Claude Barret, H.R. Moser (Burke Peerage), O.Guionneau, L.B. de Rouge, E. Polti, N. Danican (Britain's Royal Families; Buthlaw, Succession of Strathclyde, the Armorial 1961-62) A.Terlinden (Genealogy of the existing British Peerage, 1842), L. Gustavsson, C. Cheneaux, E. Lodge, S. Bontron (Brian Tompsett), R. Dewkinandan, H. de la Villarmois, C. Donadello; Scevole de Livonniere, H. de la Villarmois, I. Flatmoen, P. Ract Madoux (History of Morhange; Leon Maujean; Annuaire de Lorraine, 1926; La Galissonniere: Elections d'Arques et Rouen), Jean de Villoutreys (ref: Georges Poull), E. Wilkerson-Theaux (Laura Little), O. Auffray, A. Brabant (Genealogy of Chauvigny of Blot from "Chanoine Prevost Archiviste du Diocese de Troyes Union Typographique Domois Cote-d'Or 1925), Emmanuel Arminjon (E Levi-Provencal Histoire de l'Espagne Andalouse), Y. Gazagnes-Gazanhe, R. Sekulovich and J.P. de Palmas ("notes pierfit et iconographie Insecula", Tournemire), H de Riberolles (Base Tournemire), Franck Veillon; ,(Histoire Généalogique de la Maison de Hornes, Bruxelles 1848; Notice Historique Sur L'Ancien Comté de Hornes, Gand 1850; Europäische Stammtafeln, Marburg 1978); E.Driant / "La Maison de Damas" par Hubert Lamant, 1977 (Bibliothèque municipale d'Eaubonne)
........... http://geneastar.org.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.~ 1205
- b.~ 1226 d.Mar 1308
- b.~ 1148 in Braine, Aisne, Picardy, France d.28 Dec 1218 in Braine, Aisne, Picardy, France
- b.~ 1205 in Dreux, France d.1258
- b.1164 in Boves, France; alternatie POB given. d.18 Mar 1222 in Braine, Aisne, Picardy, France
- b.~ 1281 d.30 Nov 1335
- b.~ 1242 d.1304
- b.< 1165 d.> 1225
- b.~ 1205
- b.~ 1178
- d.Jan 1339
- b.~ 1175 d.> 1241
- b.~ 1225 d.~ 1297
- b.~ 1190 d.> 1244
- b.~ 1265 d.< 1328
- b.1215 d.1275
- b.~ 1237
- b.1215
- b.> 1296 d.02 May 1357
- b.~ 1210 d.< 1258
- b.~ 1244 d.>10 Nov 1331
- b.~ 1223 d.~ 1299
- b.~ 1275 d.> 1329
- b.~ 1215 d.~ 1281
- b.~ 1255
- b.1227 d.1264
- b.~ 1305 d.Jan 1347
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They had a son named Pierre I De.