Nielsen Hayden genealogy
Family: Robert of Meulan / Isabel de Vermandois (F1788)
m. 1096-
Male
Robert of Meulan
Birth Abt 1046 Beaumont-le-Roger, Eure, Normandy, France 
Death 5 Jun 1118 Burial Abbey St. Pierre, Preaux, Eure, Normandy, France Marriage 1096 [1, 2, 3] Father Roger "Barbatus" de Beaumont | F232 Group Sheet Mother Adeline de Meulan | F232 Group Sheet
Female
Isabel de Vermandois
Birth Death Bef Jun 1147 Burial Other Spouse William II de Warenne | F4959 Marriage Aft 5 Jun 1118 Father Hugues le Grand | F2751 Group Sheet Mother Adèle de Vermandois | F2751 Group Sheet
Female
+ Isabel de Beaumont
Birth Death Aft 1172 Burial Spouse Gilbert "Strongbow" fitz Gilbert | F5490 Marriage
Male
+ Waleran of Meulan
Birth 1104 Death 9 Apr 1166 Abbey St. Pierre, Preaux, Eure, Normandy, France Burial Abbey St. Pierre, Preaux, Eure, Normandy, France Spouse Agnes de Montfort | F4055 Marriage Abt 1141
Male
+ Robert of Meulan
Birth 1104 Meulan, Île-de-France, France Death 5 Apr 1168 Burial Leicester Abbey, Leicester, Leicestershire, England Spouse Amice de Gael | F4526 Marriage Aft Nov 1120
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.