John de Mohun
John was born in 1230 in Dunster, Somersetshire, England.

 Joan de Ferrers
Joan was born in 1238 in Ferrers, Derby, England.  She died at the age of 29 in October 1267 in Berkeley, Gloucester, England.  She was buried in Monastery of St. Augustine, Gloucester, England.

 John de Mohun
John was born about 1256 in Dunster, Somerset, England.