| Father | John DE MONTAGU Third Earl of Salisbury (1350 - 1400) |
| Mother | Maude FRANCIS Countess of Salisbury (1359 - 1424) |
| Sibling | Thomas MONTAGU Fourth Earl of Salisbury (1388 - 1428) |
| Sibling | Lady Anne MONTAGUE (1394 - 1457) |
| Sibling | William MONTAGU (1393 - 1427) |
| Sibling | Elizabeth MONTACUTE (1385 - 1438) |
| Sibling | Thomas MONTAGUE (1370 - ) |
| Sibling | Robertus MONTAGUE (Montacute) (1385 - ) |
| Sibling | Margaret DE MONTAGU (1384 - 1416) |
| Sibling | Richard DE MONTAGUE (1389 - 1400) |
| Sibling | John PERS DE MONTAGU (1400 - ) |
| Sibling | Margaret MONTACUTE (1386 - ) |
| Sibling | Richard MONTACUTE (1377 - ) |
| Sibling | Elizabeth MONTACUTE (1390 - ) |
| Sibling | Robert DE MONTACUTE (1381 - ) |
| Sibling | Anne MONTAGUE Duchess of Exeter (1384 - 1457) |