| Father | Sir John Cornewalles Cornwallis "Knight" (1490 - 1544) |
| Mother | Dame Mary Sulyard (1497 - 1544) |
| Sibling | Sir Thomas Cornwallis "High Sheriff of Norfolk And Suffolk, Privy Councillor, Treasurer of Calais, Comptroller of The Household, Elected Mp" (1519 - 1604) |
| Sibling | Mary Cornwallis (1523 - ) |
| Sibling | William Cornwallis (1531 - 1608) |
| Sibling | Hasset Cornwallis (1532 - ) |
| Sibling | Elizabeth Cornwallis (1521 - ) |
| Sibling | Anne Cornwallis (1521 - 1567) |
| Sibling | Elizabeth Cornwallis (1522 - 1546) |
| Sibling | Henry Cornwallis (1525 - 1598) |