Sir Reginald de Hampden III
Reginald was born in 1257.  He died at the age of 75 in 1332.

 Nichola de Grenville
Nichola was born in 1269 in Chilton, Wotton, Bucks, England.

 John de Hampden
John was born in 1300 in Buckinghamshire, England.  He died at the age of 75 in 1375.