Nielsen Hayden genealogy
Family: Richard de Clare / Maud de Lacy (F2421)
m. Abt 25 Jan 1238-
Father | Male
Richard de Clare
Born 4 Aug 1222 of Clare, Suffolk, England 
Died Jul 1262 Ashenfield, Waltham, Kent, England 
Buried Tewkesbury Abbey, Tewkesbury, Gloucestershire, England 
Married Abt 25 Jan 1238 [1, 2, 3, 4] Other Spouse Margaret de Burgh | F620 Married Bef 29 Sep 1236 St. Edmundsbury Cathedral, Bury St. Edmunds, Suffolk, England 
Father Gilbert de Clare | F2646 Group Sheet Mother Isabel Marshal | F2646 Group Sheet
Mother | Female
Maud de Lacy
Born Died 1288-1289 Buried Father John de Lacy | F6218 Group Sheet Mother Margaret de Quincy | F6218 Group Sheet
Child 1 | Male
+ Thomas de Clare
Born Between 1243 and 1248 Died 29 Aug 1287 Ireland 
Buried Spouse Juliane fitz Maurice | F3790 Married Bef 18 Feb 1275
Child 2 | Male
+ Gilbert de Clare
Born 2 Sep 1243 Christchurch, Hampshire, England 
Died 7 Dec 1295 Monmouth Castle, Monmouthshire, Wales 
Buried Tewkesbury Abbey, Tewkesbury, Gloucestershire, England 
Spouse Alice de Lusignan | F54 Married 1253 Spouse Joan of Acre | F6425 Married May 1290 Westminster Abbey, Westminster, Middlesex, England 
Child 3 | Female
+ Rose de Clare
Born 17 Aug 1252 Died Aft 1315 Buried Church of the Friars Preachers, Pontefract, Yorkshire, England 
Spouse Roger de Mowbray | F130 Married Aft 15 Jul 1270
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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.
- [S1016] Medieval English Ancestors of Robert Abell by Carl Boyer III. Santa Clarita, California, 2001.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.