Nielsen Hayden genealogy
Family: John la Warre / Joan de Grelle (F11979)
m. Aft 19 Nov 1294-
Father | Male
John la Warre
Born Between 1276 and 1277 of Ewyas Harold, Herefordshire, England 
Died 9 May 1347 Buried Married Aft 19 Nov 1294 [1] Father Roger la Warre | F11982 Group Sheet Mother Clarice de Tregoz | F11982 Group Sheet
Mother | Female
Joan de Grelle
Born Died 20 Mar 1353 Buried Father Robert de Grelle | F11980 Group Sheet Mother Hawise de Burgh | F11980 Group Sheet
Child 1 | Female
+ Katherine la Warre
Born Died 9 Aug 1361 Buried Spouse Warin le Latimer | F11975 Married Bef 1329
Child 2 | Male
+ John la Warre
Born of Wickwar, Gloucestershire, England 
Died Bef 24 Jun 1331 Buried Spouse Margaret de Holand | F19232 Married Bef 1326
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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.