Individual Details
Living
( - )
Families
| Father | Sir Thomas ap Gwilym (1356 - 1438) |
| Mother | Maud Morley (1369 - 1438) |
| Sibling | John Herbert (1404 - 1469) |
| Sibling | Sir William "Lord Ragland, The Blue Knight of Gwent" ap Thomas (1377 - 1446) |
| Sibling | Howel ap Guillem (1390 - ) |
| Sibling | David ap Guillem (1397 - 1398) |
| Sibling | Unknown ap Guillem (1399 - ) |