1129 - 1176 (47 years)
 | Earl of Ulster John de Courcy Bef 1150-Aft 1210 |
| Earl of Ulster John de Courcy | |
| B: | Bef 1150 |
| Somerset, England | |
| D: | Aft 1210 |
 | Baron Reginald Jourdaine 1210-1289 |
| Baron Reginald Jourdaine | |
| B: | 1210 |
| France | |
| D: | 1289 |
| Sir Jordan de Courcy 1195- |
| Sir Jordan de Courcy | |
| B: | 1195 |
| Jordan Teutonicus de Courcy 1161-1197 |
| Jordan Teutonicus de Courcy | |
| B: | 1161 |
| Islip, Oxfordshire, England | |
| D: | 1197 |
| Antrim County, Northern Ireland | |
|
| Jordan de Courcy 1129-1176 |
| Jordan de Courcy | |
| B: | 1129 |
| Islip, Oxfordshire, England | |
| D: | 1176 |
| Grimsby, Lincolnshire, 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.
