Edmund de Mortimer
Edmund was born in 1255.  He died at the age of 49 on July 17th, 1304.

 Margaret de Fiennes
Margaret was born in 1262.  She died at the age of 71 on February 7th, 1333.

 Roger de Mortimer
Roger was born on April 25th, 1287.  He died at the age of 43 on November 29th, 1330.