Reginald I de Mohun
Reginald I was born in Devonshire, England.  He died in 1213 in Dunster, Somersetshire, England.

 Alice de Briwere
Alice was born about 1185 in Dunster, Somersetshire, England.  She died after 1233.

 Reginald II de Mohun
Reginald II was born about 1206 in Dunster, Somersetshire, England.  He died in Torre Mohun, Devonshire, England.

 John de Mohun
John was born before 1213.  He died in Gascony.

 William de Paynel
William was born before 1213.