Maurice ("the Resolute") de Berkeley
Maurice, known as "the Resolute", was born in 1218 in Berkeley, Gloucestershire, England.  He died at the age of 63 on April 4th, 1281 in Berkeley, Gloucestershire, England.

 Isabel de Dover
Isabel was born in 1225.  She died at the age of 51 on July 7th, 1276.

 Thomas ("the Wise") de Berkeley
Thomas, known as "the Wise", was born in 1245 in Berkeley Castle, Gloucestershire, England.  He died at the age of 76 on July 23rd, 1321 in Bristol, Gloucestershire, England.