Compact tree of Sir Robert Howard
| Sir John Howard 1276–1331 | |||||||||||||
| Sir Admiral John Howard 1310–1347 |
|
Alice de Boys 1314–1372 | |||||||||||
| Richard “King of the Romans” Plantagenet 1209–1272 | |||||||||||||
| Richard “Earl of Cornwall” de Cornwall 1252–1280 | Joan de Cornwall 1286–1342 | Joan St. Owen 1260–1316 | |||||||||||
| Joan de Valletort 1214–1267 | |||||||||||||