| Father | Sir Dafydd AP DAVID Lord of Landaff, Baron of Glamorgan (1400 - 1484) |
| Mother | Lady Gwenllian Verch DAFYDD HERBERT (1392 - 1440) |
| Sibling | David MATHEW (1425 - 1454) |
| Sibling | Katherine MATHEW (1429 - ) |
| Sibling | John MATTHEW (1430 - 1476) |
| Sibling | John MATHEW (1431 - 1461) |
| Sibling | Rimron MATHEW (1434 - 1470) |
| Sibling | Mevanvy Verch DAFFYDD (1436 - 1485) |
| Sibling | Thomas Ap David MATHEW (1438 - 1470) |
| Sibling | Lady Margaret HERBRASS Baroness (1439 - 1460) |
| Sibling | Margred VERCH DAFYDD MATHEW (1440 - 1534) |
| Sibling | David MATHEW (1440 - 1443) |
| Sibling | William I MATHEWS (1440 - 1488) |
| Sibling | Jenkin MATHEW (1446 - ) |
| Sibling | Thomas I Jenkyn MATHEW (1448 - 1479) |
| Sibling | William Leia MATHEW (1448 - 1548) |
| Sibling | Ellen MATHEW (1452 - ) |
| Sibling | Morgan DAVID ( - ) |