*Joan of Lancaster
born about 1320 Grismond Castle, Monmouth, England
died 7 July 1349

father:
*Henry Plantagenet 3rd Earl of Lancaster
born about 1281 Grismond Castle, Monmouth, England
died 22 September 1345 Monastry of Cannons, England
buried Monastry of Cannons, England

mother:
*Maud de Chaworth
born 1282 Kidwelly, Glamorganshire, Wales
died after 19 February 1317
buried before 3 December 1322 Priory, Mottisfont, Hampshire, England
married before 2 March 1296/97

siblings:
*Maud of Ulster Plantagenet born 1298/1304 Lancaster, Lancashire, England
died about 5 May 1377 buried Priory, Campsey, Suffolk, England
Henry Lancaster born about 1299 Grismond Castle, Monmouth, England died 24 March 1360/61
Blanche of Lancaster born about 1302 Grismond Castle, Monmouth, England died 10 July 1380
Isabel of Lancaster born about 1308 Grismond Castle, Monmouth, England died after 1 February 1347
Eleanor Plantagenet born about 1311/22 Grismond Castle, Monmouth, England died 11 January 1372 Arundel, Sussex, England
*Mary Plantagenet of Lancaster born 1320 Tutbury Castle, Tutbury, Staffordshire, England
died 1 September 1362 buried Alnwick, Northumberland, England

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

children:
Eleanor Mowbray born about 1332 died 10 June 1387
*Sir John (III) 4th Earl of Mowbray born 25 June 1340 Epworth, Isle of Axhelme, Lincolnshire, England
died 9 October 1368 Thrace, Byzantium
Alexander Mowbray born about 1342 Kirklington, Yorkshire, England died Kirklington, Yorkshire, England

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com