Thomas De Mowbray
Thomas was born on March 22nd, 1367.  He died at the age of 13 on September 22nd, 1380.

 Elizabeth Fitzalan
Elizabeth was born in 1375.  She died at the age of 50 on July 8th, 1425.

 Isabel De Mowbray
Isabel was born in 1396.  She died at the age of 56 on September 29th, 1452.