William IV de MOHUN
William IV de was born before 1176 in England.

 Lucy UNKNOWN
Lucy was born about 1165 in Cambrdigeshire, England.  Lucy is no longer alive.

 Reynold (Reginald ) I de MOHUN
Reynold (Reginald ) I de was born about 1183 in Dunster, williton, Somersetshire, England.  He died in 1213.