Nielsen Hayden genealogy
Family: Richard "Strongbow" fitz Gilbert / Eve of Leinster (F4831)
m. Abt 26 Aug 1170-
Father | Male
Richard "Strongbow" fitz Gilbert
Born Abt 1130 Died Abt 20 Apr 1176 Dublin, Ireland 
Buried Christ Church, Dublin, Ireland 
Married Abt 26 Aug 1170 [1, 2] Waterford, Munster, Ireland [1, 2] 
Other Spouse (Unknown mistress of Richard de Clare) | F4174 Married Father Gilbert "Strongbow" fitz Gilbert | F5490 Group Sheet Mother Isabel de Beaumont | F5490 Group Sheet
Mother | Female
Eve of Leinster
Born Abt 1145 Died Aft 1185 Buried Tintern Abbey, Monmouthshire, Wales 
Father Diarmait Mac Murchada, King of Leinster | F4125 Group Sheet Mother Mor ni Tuathail | F4125 Group Sheet
Child 1 | Female
+ Isabel de Clare
Born 1173 Died 7 Mar 1220 Buried Tintern Abbey, Monmouthshire, Wales 
Spouse William Marshal | F5382 Married Aug 1189 London, England 
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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., "abt. 1171".
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.