John De Mowbray
John De was born on November 29th, 1310.  He died at the age of 50 on October 4th, 1361.

 Joan Plantagenet
Joan was born in 1310 in , , Norfolk, England.  She died at the age of 39 on July 7th, 1349 in High Alter, Byland.

 John De Mowbray
John De was born on June 25th, 1340 in Epworth, Isle Axholme, Lincolnshire, England.  He died at the age of 28 in 1368 in Constantinople, Constantinople, Turkey.