Nielsen Hayden genealogy
Family: Adam de Newmarch / Elizabeth de Mowbray (F11177)
m. Bef 1263-
Father | Male
Adam de Newmarch
Born Bef 1236 of Womersley, Yorkshire, England 
Died Bef 20 Jan 1303 Buried Married Bef 1263 [1] Father Adam de Newmarch | F11178 Group Sheet Mother Joan | F11178 Group Sheet
Mother | Female
Elizabeth de Mowbray
Born Died Aft Sep 1317 Buried Father Roger de Mowbray | F11180 Group Sheet Mother (Unknown) de Furnival | F11180 Group Sheet
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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.