Gilbert De Clare
Gilbert was born about 1180 in Gloucester.

 Isabel Marshall
Isabel was born on October 9th, 1200 in Pembroke.

 Richard De Clare
Richard was born on August 4th, 1222 in Gloucestershire, England.  He died at the age of 39 on July 15th, 1262 in Ashenfield Manor, Waltham, Kent, England.  He was buried on July 28th, 1262 in Tewkesbury, Gloucestershire, England.

 Isabel De Clare
Isabel was born on November 8th, 1226.  She died at the age of 28 in 1254.