Nielsen Hayden genealogy
Family: Constantine de Clifton / Katherine de la Pole (F11813)
m. Bef 20 May 1340-
Father | Male
Constantine de Clifton
Born of Buckenham Castle, Norfolk, England 
Died Bef 20 Jan 1363 Buried Married Bef 20 May 1340 [1] Father Adam de Clifton | F11814 Group Sheet Mother Eleanor de Mortimer | F11814 Group Sheet
Mother | Female
Katherine de la Pole
Born Died Bef 17 Feb 1363 Buried Father William de la Pole, Mayor of Hull | F11797 Group Sheet Mother Katherine | F11797 Group Sheet
Child 1 | Male
+ John de Clifton
Born Abt 1353 of Buckenham, Norfolk, England 
Died 10 Aug 1388 Rhodes 
Buried Spouse Elizabeth de Cromwell | F11812 Married
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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.