1050 - 1100 (50 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 |
 | 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 | |
| Emma de Falaise 1076-1129 |
| Emma de Falaise | |
| B: | 1076 |
| Somerset, England | |
| D: | 1129 |
| England | |
| Baron William de Courcy 1072-1114 |
| Baron William de Courcy | |
| B: | 1072 |
| Somerset, England | |
| M: | 1094 |
| Somerset, England | |
| D: | 1114 |
| Somerset, England | |
|
| William de Falaise 1050-1100 |
| William de Falaise | |
| B: | 1050 |
| Normandy, France | |
| D: | 1100 |
| Somerset, England | |
 | Geva de Burci 1055-1100 |
| 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.
