Biography
John de Mowbray, 4th Baron Mowbray, was born 25 June 1340 in Epworth, Isle of Axholme, Lincolnshire, England, United Kingdom to John de Mowbray (1310-1361) and Joan Plantagenet (c1310-c1349) and died 1368 Constantinople, Turkey of unspecified causes. He married Elizabeth de Segrave (1338-1368) 1349 JL .
Children
| Name | Birth | Death | Joined with |
| Eleanor de Mowbray (1355-1399) | 1355 | 1399 | John de Welles (1352-1421) |
| Margaret Mowbray (c1361-1399) | 1361 | 1399 | Reginald Lucy (c1360-1437) |
| Jane de Mowbray (1362-1402) | |||
| John de Mowbray, 1st Earl of Nottingham (1365-1381) | |||
| Thomas de Mowbray, 1st Duke of Norfolk (1366-1399) | 22 March 1366 Isle Of Axholme, Lincolnshire | 22 September 1399 Venice | Elizabeth le Strange (1373-1383) Elizabeth FitzAlan (1366-1425) |
Footnotes (including sources)
| ‡ General |