1050 - 1100 (50 years)
| Earl of Ulster John de Courcy | |
| B: | Bef 1150 |
| Somerset, England | |
| D: | Aft 1210 |
| Thomas Jordaine | |
| B: | 1418 |
| France | |
| D: | 1478 |
| France | |
| Christie Chantmarle | |
| B: | Abt 1418 |
| Vendée, Pays de la Loire, France | |
| D: | Norfolk, England |
| John Jordaine | |
| B: | 1390 |
| Wolverton, Buckinghamshire, England | |
| D: | 1487 |
| Norfolk, England | |
| Christie Chantmarle | |
| B: | 1400 |
| Wolverton, Hampshire, England | |
| M: | 1411 |
| England | |
| D: | Norfolk, England |
| John Jourdaine, IV | |
| B: | Abt 1350 |
| Wolverton, Buckinghamshire, England | |
| D: | 1426 |
| Wolverton, Buckinghamshire, England | |
| John Jourdaine, III | |
| B: | 1320 |
| England | |
| D: | 1350 |
| John Jourdaine, II | |
| B: | 1280 |
| D: | 1314 |
| Wolverton, Buckinghamshire, England | |
| John Jourdaine, I | |
| B: | 1231 |
| Wolverton, Buckinghamshire, England | |
| D: | 1320 |
| Wolverton, Buckinghamshire, England | |
| Baron Reginald Jourdaine | |
| B: | 1210 |
| France | |
| D: | 1289 |
| Sir Jordan de Courcy | |
| B: | 1195 |
| Jordan Teutonicus de Courcy | |
| B: | 1161 |
| Islip, Oxfordshire, England | |
| D: | 1197 |
| Antrim County, Northern Ireland | |
| Jordan de Courcy | |
| B: | 1129 |
| Islip, Oxfordshire, England | |
| D: | 1176 |
| Grimsby, Lincolnshire, England | |
| Emma de Falaise | |
| B: | 1076 |
| Somerset, England | |
| D: | 1129 |
| England | |
| Baron William de Courcy | |
| B: | 1072 |
| Somerset, England | |
| M: | 1094 |
| Somerset, England | |
| D: | 1114 |
| Somerset, England | |
|
| William de Falaise | |
| B: | 1050 |
| Normandy, France | |
| D: | 1100 |
| Somerset, England | |
| Geva de Burci | |
| B: | 1055 |
| Normandy, France | |
| M: | Abt 1074 |
| England | |
| D: | 1100 |
| Somerset, England | |
We make every effort to document our research. There is a lot of information that I do not have, and I know there are mistakes in this tree. My feelings will not be hurt if you give me corrections or additional information, especially if you can provide sources for the information.
