Earl Reynold de Mohun II of Somerset
Reynold was born about 1206 in Dunster Castle, Somersetshire, England.  He died on January 20th, 1257 in Tor Mohun, Devonshire, England.

 Isabella de Ferrers
Isabella was born about 1215 in Chartley, Derby, England.  She died on November 26th, 1260.

 Isabel de Mohun
Isabel was born about 1252.