Baron William Fitzmartin, I of Cemais
1135 - 1216 (81 years)
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| Sir Oliver Martin, III 1344-1420 |
| Sir Oliver Martin, III | |
| B: | 1344 |
| D: | 1420 |
 | Hannah Englerud 1350-1382 |
| Hannah Englerud | |
| B: | 1350 |
| D: | 1382 |
| Baron Robert Martin, IV of Athelhampton 1310-1380 |
| Baron Robert Martin, IV of Athelhampton | |
| B: | 1310 |
| D: | 1380 |
| Margaret Basset 1322-1394 |
| Margaret Basset | |
| B: | 1322 |
| D: | 1394 |
| Baron Robert Martin, III of Athelhampton 1285-1375 |
| Baron Robert Martin, III of Athelhampton | |
| B: | 1285 |
| D: | 1375 |
| Lady Elizabeth Yeovilton 1290-1313 |
| Lady Elizabeth Yeovilton | |
| B: | 1290 |
| D: | 1313 |
| Sir Robert Martin, II 1265-1307 |
| Sir Robert Martin, II | |
| B: | 1265 |
| Oxton Hall, Devonshire, England | |
| D: | 1307 |
| Oxton Hall, Devonshire, England | |
| Lady Elizabeth Fitzpiers 1265-1309 |
| Lady Elizabeth Fitzpiers | |
| B: | 1265 |
| Athelhampton, Dorset | |
| D: | 1309 |
| Baron Robert Martin, I of Dartington Athelhampton | |
| B: | 1235 |
| Athelhampton, Dorset | |
| D: | 1285 |
| Athelhampton, Dorset | |
| Baroness Mary Yeovilton, of Athelhampton Abt 1240-1309 |
| Baroness Mary Yeovilton, of Athelhampton | |
| B: | Abt 1240 |
| Athelhampton, Dorset | |
| D: | 1309 |
| Dartington Hall, Blagdon, Devonshire , England | |
| Baron Nicholas Fitzmartin, of Blagdon Daetington and Cemai and Constable of Carmarthen | |
| B: | 1193 |
| Dartington Hall, Blagdon, Devonshire , England | |
| D: | 22 Mar 1282 |
| Combe, Martin Manor, Barnstable, Devonshire, England | |
| Baroness Isabel Fitzwilliams 1200-1282 |
| Baroness Isabel Fitzwilliams | |
| B: | 1200 |
| Withycombe, Williton, Somerset, England | |
| D: | 22 Mar 1282 |
| Combe, Martin Manor, Barnstable, Devonshire, England | |
| Baron William Fitzmartin, II of Blagdon Cemise and Dartington | |
| B: | 1160 |
| Blagdon, Somerset | |
| D: | 1215 |
| Galway, Ireland | |
| Baroness Avice De Torrington 1165-1246 |
| Baroness Avice De Torrington | |
| B: | 1165 |
| D: | 1246 |
|
| Baron William Fitzmartin, I of Cemais 1135-1216 |
| Baron William Fitzmartin, I of Cemais | |
| B: | 1135 |
| Dynevor, Carmarthenshire, Wales | |
| D: | 1216 |
| Combe Martin Manor, Barnstaple, Devonshire, England | |
| Lady Angharad Verch Rhys, Princess of South Wales | |
| B: | 1140 |
| Llandilo, Carmarthenshire, Wales | |
| M: | 1159 |
| Dartington, Devon | |
| D: | Aug 1226 |
| Dynevor Castle, Llandilo, Carmarthenshire, Wales | |