William Marshall
William was born in 1146 in Normandy,France.  He died at the age of 73 on May 14th, 1219 in Caversham Manor,London.

 Isabel de Clare
Isabel was born in 1173 in Pembroke,Pembrokeshire,Wales.  She died at the age of 47 in 1220.  She was buried in Tintern Abbey.

 Isabel Marshall
Isabel was born on October 9th, 1200 in Pembroke Castle,Pembrokeshire,Wales.  She died at the age of 38 on January 15th, 1239 in Berkhamsted,Hertfordshire.