Nielsen Hayden genealogy
Family: John de Grey / Katherine Fitz Alan (F22596)
m. Bef 1 Mar 1312-
Male
John de Grey
Birth 9 Oct 1300 Death 1 Sep 1359 Rotherfield, Oxfordshire, England 
Burial Marriage Bef 1 Mar 1312 Other Spouse Avice Marmion | F9565 Marriage Bef 1341 Father John de Grey | F9566 Group Sheet Mother Margaret de Odingsells | F9566 Group Sheet
Female
Katherine Fitz Alan
Birth Abt 1300 Death Bef 1340 Burial Black Friars, York, Yorkshire, England Father Brian Fitz Alan | F11702 Group Sheet Mother Maud | F11702 Group Sheet
Male
+ John de Grey
Birth Between 1319 and 1329 of Rotherfield, Oxfordshire, England Death 4 Jun 1375 Burial Spouse Maud | F22595 Marriage