Jean IV Capet-Dreux-Montfort de Bretagne was born 1339 to Jean de Montfort (1294-1345) and Joanna of Flanders (c1295-1374) and died 1 November 1399 of unspecified causes. He married Mary of England (1344-1362) 3 June 1361 JL . He married Joan Holland (c1356-1384) May 1366 JL . He married Joanna of Navarre (1370-1437) 2 November 1386 JL .
Children
| Name | Birth | Death | Joined with |
| Jeanne de Bretagne (1387-1388) | |||
| Fille de Bretagne (1388-1388) | |||
| Jean V de Bretagne (1389-1442) | 24 December 1389 | 29 August 1442 | Jeanne de Valois (1391-1433) |
| Marie de Bretagne (1391-1446) | 18 February 1391 Nantes | 18 December 1446 | Jean I d'Alençon (1385-1415) |
| Arthur III de Bretagne (1393-1458) | |||
| Gilles de Bretagne (1394-1412) | |||
| Marguerite de Bretagne (1392-1428) | 1392 | 13 April 1446 Blain | Alain IX de Rohan (c1381-1462) |
| Richard d'Etampes (1395-1438) | 1395 | 2 July 1438 Château de Clisson, Clisson, Loire-Atlantique, Pays de la Loire, France | Marguerite d'Orléans (1406-1466) |
| Blanche de Bretagne (1397-aft1419) | |||
Footnotes (including sources)
| ‡ General |
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