Here's what I'm thinking:
Henry V of England (b.1387: d.1432) m. Catherine of Valois (b.1401: d.1445) (a)
Henry V of England (b.1387: d.1432) m. Catherine of Valois (b.1401: d.1445) (a)
1a) Henry VI of England (b.1421)
2a) Edward Plantagenet, Prince of England (b.1424: d.1440)
3a) Mary Plantagenet, Princess of England (b.1426)
4a) John Plantagenet, Prince of England (b.1428)
5a) Joan Plantagenet, Princess of England (b.1430: d.1433)
6) Thomas Plantagenet, Prince of England (b.1431: d.1432)
2a) Edward Plantagenet, Prince of England (b.1424: d.1440)
3a) Mary Plantagenet, Princess of England (b.1426)
4a) John Plantagenet, Prince of England (b.1428)
5a) Joan Plantagenet, Princess of England (b.1430: d.1433)
6) Thomas Plantagenet, Prince of England (b.1431: d.1432)