| Father | Earl Thomas SACKVILLE (1536 - 1608) |
| Mother | Countess Cecily BAKER of Dorset (1535 - 1615) |
| Sibling | Thomas HOWARD 4TH DUKE OF NORFOLK, 4TH EARL OF SURREY, 15 BARON SEGRAVE, 14TH BARON MOWBRAY KG, EARL MUASHALL (1536 - 1572) |
| Sibling | Mary SACKVILLE (1559 - ) |
| Sibling | Sir Thomas SACKVILLE (1571 - 1646) |
| Sibling | Anne SACKVILLE (1571 - 1625) |
| Sibling | Elizabeth SACKVILLE (1586 - ) |
| Sibling | Mary SACKVILLE (1584 - 1616) |
| Sibling | Sir John SACKVILLE (1567 - 1619) |
| Sibling | Henry SACKVILLE (1565 - ) |
| Sibling | Jane Lady SACKVILLE (1573 - 1629) |