| Henry De Percy Born: ABT 1320 Alnwick, Northumberland, England Died: 18 MAY 1368 Warkworth Castle, Alnwick, Northumberland, England | |||||
| Thomas De Percy Born: ABT 1344 Died: 1403 [executed following the Battle of Shrewsbury] | |||||
| Mary Plantagenet Born: ABT 1320 Grismond Castle, Monmouth, Monmouthshire, England Died: 1 SEP 1362 | |||||