*Sir John (III) 4th Earl of Mowbray
born 25 June 1340 Epworth, Isle of Axhelme, Lincolnshire, England
died 9 October 1368 Thrace, Byzantium

father:
*John (II) Baron Mowbray
born 29 November 1310 Hovingham, Yorkshire, England
died 4 October 1361 York, Yorkshire, England

mother:
*Joan of Lancaster
born about 1320 England
died 7 July 1349

siblings:
Eleanor Mowbray born about 1332 died 10 June 1387
Alexander Mowbray born about 1342 Kirklington, Yorkshire, England died Kirklington, Yorkshire, England

spouse:
*Elizabeth de Segrave
born 25 October 1338 Croxton, England
died 24 May 1368 or 24 March 1397/98 England

children:
John (de) Mowbray born about 1362 died before 1382
*Jane (Joan) de Mowbray born about 1363 England died (after?) 30 November 1402 England
Eleanor (de) Mowbray born before 25 March 1364 England died after 1399
Sir Thomas (de) Mowbray born 22 March 1366 England died 22 September 1399 Venice, Italy

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com