Edmund De Stafford
Edmund was born on July 15th, 1272.  He died at the age of 36 in August 1308.

 Margaret De Basset
She died on March 17th, 1336.

 Earl Ralph De Stafford Of Stafford
Ralph was born on September 24th, 1301.  He died at the age of 70 on August 31st, 1372.