Humphrey de Bohun
Humphrey was born in 1109.  He died at the age of 78 in 1187.

 Margaret De Pitres
Margaret was born in 1134.  She died at the age of 53 on April 6th, 1187.

 Humphrey de Bohun
Humphrey was born in 1140.  He died at the age of 42 in 1182.