Henry "Of Grosmont" Plantagenet 1
- Born: Abt 1300, Grosmont Castle, Grosmont, Monmouthshire, England
- Marriage: Isabel De Beaumont
- Died: 24 Mar 1360-1361, Spms, Leicester, Leicestershire, England, about age 60
- Buried: Newark Church, Leicester, Leicestershire, England
Ancestral File Number: PZ3X-CR.
Henry married Isabel De Beaumont, daughter of Henry Beaumont and Alice Comyn. (Isabel De Beaumont was born about 1315 of Loughborough Castle, Loughborough, Leicestershire, England and died after 24 Mar 1360-1361.)