Nielsen Hayden genealogy
Family: Henry of Grosmont / Isabel de Beaumont (F9683)
m. Abt 1337-
Male
Henry of Grosmont
Birth 1314 Death 24 Mar 1361 Leicester, Leicestershire, England 
Burial Leicester, Leicestershire, England Marriage Abt 1337 Father Henry of Lancaster | F1680 Group Sheet Mother Maud de Chaworth | F1680 Group Sheet
Female
Isabel de Beaumont
Birth Death Aft 24 Mar 1361 Burial Father Henry de Beaumont | F9687 Group Sheet Mother Alice Comyn | F9687 Group Sheet
Female
+ Blanche of Lancaster
Birth 25 Mar 1342 Death 12 Sep 1368 Burial St. Paul's Cathedral, London, England Spouse John of Gaunt | F9684 Marriage May 1359 Reading Abbey, Berkshire, England