Henry De Grey
Henry was born in 1256.  He died at the age of 52 in September 1308.

 Elizabeth de Courtenay
Elizabeth was born in 1255.  She died at the age of 46 in 1301.

 Richard De Grey
Richard was born in 1281 in Condor, Derbyshire, England.  He died at the age of 53 on March 10th, 1334.