Earl of Cornwall Earl of Cornwall Richard Plantagenet
1208 - 1272 (64 years)
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| Joan de Cornwall | |
| B: | 1273 |
| Thonock, Gainsborough, Lincolnshire, England | |
| D: | Yes, date unknown |
| Margaret de Whalesburgh | |
| B: | 1325 |
| Whalesborough, Cornwall, England | |
| D: | 1412 |
| Kingsbridge, Devon, England | |
| John de Beauchamp | |
| B: | Abt 1315 |
| Ryme Instrinseca, Dorset, England | |
| D: | Abt 08 Apr 1348 |
| Ryme Instrinseca, Dorset, England | |
| Lamellen Cornwall | |
| B: | Mar 1291 |
| Cornwall, England | |
| D: | Yes, date unknown |
| Sir Sir John de Whalesborough | |
| B: | 1315 |
| Whalesborough, Cornwall, England | |
| D: | 1362 |
| Trigg, Cornwall, England | |
| Sir Sir Richard de Cornwall, Lord of Thunnock | |
| B: | 1252 |
| Berkhampstead, Hertfordshire, England | |
| D: | 1296 |
| Berwick, Northumberland, England | |
| Joan St. Owen | |
| B: | 1260 |
| Winchester, Hampshire, England | |
| M: | 1279 |
| Cornwall, England | |
| D: | Yes, date unknown |
| Earl of Cornwall Earl of Cornwall Richard Plantagenet | |
| B: | 05 Jan 1208 |
| Winchester Castle, Hampshire, England | |
| D: | 02 Apr 1272 |
| Berkhampstead Castle, Hertfordshire, England | |
| Joan Valletort | |
| B: | 1229 |
| England | |
| D: | 1299 |