Nielsen Hayden genealogy
Family: William de Mowbray / Avice (F783)
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Father | Male
William de Mowbray
Born of the Isle of Axholme, Lincolnshire, England 
Died Bef 25 Mar 1224 Buried Newburgh Abbey, Yorkshire, England 
Married Father Nele de Mowbray | F848 Group Sheet Mother Mabel | F848 Group Sheet
Child 1 | Male
+ Roger de Mowbray
Born Abt 1220 of Thirsk, Yorkshire, England 
Died Bef 18 Oct 1263 Buried Church of the Friars Preachers, Pontefract, Yorkshire, England 
Spouse (Unknown) de Furnival | F11180 Married Aft 13 Apr 1238 Spouse Maud de Beauchamp | F151 Married Bef 1257