1164 - 1221 (57 years)
| 3rd Baron of Okehampton Sir Hugh de Courtenay | |
| B: | 25 Mar 1249 |
| Okehampton, Devon, England | |
| D: | 28 Feb 1291 |
| Colyton, Devon, England | |
| Baroness Okehampton Eleanor le de Spencer | |
| B: | 1248 |
| Ryhall, Rutland, England | |
| D: | 30 Sep 1328 |
| London, England | |
 | Isabel de Vere 1228-1300 |
| Isabel de Vere | |
| B: | 1228 |
| Totnes, Devon, England | |
| D: | 11 Aug 1300 |
| Okehampton, Devon, England | |
| 2nd Baron of Okehampton John de Courtenay | |
| B: | 26 Jul 1224 |
| Okehampton, Devon, England | |
| M: | 1249 |
| Devon, England | |
| D: | 3 May 1274 |
| Devon, England | |
| 5th Earl of Oxford Sir Alphonse de Vere Abt 1266-1329 |
| 5th Earl of Oxford Sir Alphonse de Vere | |
| B: | Abt 1266 |
| Oxford, Oxfordshire, England | |
| D: | 20 Dec 1329 |
| Oxford, Oxfordshire, England | |
 | Jane Foliot Abt 1262-1339 |
| Jane Foliot | |
| B: | Abt 1262 |
| Norfolk, England | |
| M: | 1300 |
| Oxford, Oxfordshire, England | |
| D: | 1339 |
| England | |
 | 5th Earl of Oxford Robert de Vere 1240-1296 |
| 5th Earl of Oxford Robert de Vere | |
| B: | 1240 |
| Essex, England | |
| D: | 2 Sep 1296 |
| Essex, England | |
 | Alice de Sanford 1230-1312 |
| Alice de Sanford | |
| B: | 1 Jan 1230 |
| Hertfordshire, England | |
| M: | 22 Feb 1252 |
| Oxfordshire, England | |
| D: | 9 Sep 1312 |
| Essex, England | |
| 4th Earl of Oxford Hugh de Vere Abt 1185-1263 |
| 4th Earl of Oxford Hugh de Vere | |
| B: | Abt 1185 |
| Essex, England | |
| D: | 23 Dec 1263 |
| Essex, England | |
 | Hawise de Quincy 1178-1263 |
| Hawise de Quincy | |
| B: | 1178 |
| Winchester, Hampshire, England | |
| M: | 11 Feb 1222 |
| Winchester, Hampshire, England | |
| D: | 3 Feb 1263 |
| Earls Colne, Essex, England | |
|
| 3rd Earl of Oxford Robert de Vere 1164-1221 |
| 3rd Earl of Oxford Robert de Vere | |
| B: | 1164 |
| Colne Engaine, Essex, England | |
| D: | 25 Oct 1221 |
| Colne Engaine, Essex, England | |
 | Isabel de Bolebec 1165-1245 |
| Isabel de Bolebec | |
| B: | 1165 |
| Whitchurch, Buckinghamshire, England | |
| M: | 1183 |
| Hatfield Broad Oak, Essex, England | |
| D: | 4 Feb 1245 |
| Oxford, Oxfordshire, 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.
