Simon De Throckmorton
Simon was born in 1251 in Throckmorton, England.

 Isabel De Donnisley
Isabel was born in 1255.  Isabel is no longer alive.

 Robert De Throckmorton
Robert was born in 1271 in Coughton, Warwickshire, England.  He died at the age of 64 in 1335 in Newton, England.