Nielsen Hayden genealogy
Family: William de Fiennes / Joan de Say (F16722)
m. Bef 1356-
Father | Male
William de Fiennes
Born of Herstmonceux, Sussex, England 
Died 2 Dec 1359 Overseas 
Buried Married Bef 1356 [1] Father John de Fiennes | F16723 Group Sheet Mother Maud de Monceux | F16723 Group Sheet
Mother | Female
Joan de Say
Born Died 29 Jun 1378 Buried Father Geoffrey de Say | F9414 Group Sheet Mother Maud de Beauchamp | F9414 Group Sheet
Child 1 | Male
+ William Fiennes
Born of Herstmonceux, Sussex, England 
Died 18 Jan 1402 Buried Herstmonceux, Sussex, England 
Spouse Elizabeth Batisford | F16719 Married Bef 23 Apr 1385
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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.