Nielsen Hayden genealogy
Family: John de Burgh / Elizabeth de Clare (F11250)
m. 30 Sep 1308-
Father | Male
John de Burgh
Born Died 18 Jun 1313 Galway, Ireland 
Buried Married 30 Sep 1308 [1] Waltham Abbey, Essex, England [1] 
Father Richard de Burgh | F11253 Group Sheet Mother Margaret | F11253 Group Sheet
Mother | Female
Elizabeth de Clare
Born Nov 1295 Caerphilly, Glamorgan, Wales 
Died 4 Nov 1360 Buried Other Spouse Thebaud de Verdun | F12033 Married 4 Feb 1316 near Bristol, Gloucestershire, England 
Other Spouse Roger Damory | F11718 Married Bef 3 May 1317 Father Gilbert de Clare | F6425 Group Sheet Mother Joan of Acre | F6425 Group Sheet
Child 1 | Male
+ William de Burgh
Born 17 Sep 1312 Died 6 Jun 1333 Le Ford (now Belfast), Ireland 
Buried Spouse Maud of Lancaster | F10925 Married Bef 16 Nov 1327
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.