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

 Elizabeth de Segrave
Elizabeth was born on October 25th, 1338.  She was buried in 1376.

 Eleanor de Mowbray
Eleanor was born before March 25th, 1364 in Opworth, Lincolnshire, England.  She died after 1399.

 Thomas de Mowbray
Thomas was born on March 22nd, 1366 in Epworth, Isle Of Axholme, Lincolnshire, England.  He died at the age of 33 on September 22nd, 1399 in Venice, Venice, Italy.  He was buried in September 1399 in St.George Abbey, Venice, Venice, Italy.