1223 - 1289 (66 years)
| Marchioness of Montferrat Isabel de Clare | |
| B: | May 1240 |
| Tonbridge, Kent, England | |
| D: | 1271 |
 | Margery de Badlesmere 1306-1363 |
| Margery de Badlesmere | |
| B: | 1306 |
| Badlesmere, Kent, England | |
| D: | 18 Oct 1363 |
| Helmsley, Yorkshire, England | |
 | 2nd Lord Ros, Knight of Helmsley and Hunsingore, Yorkshire, Wark, Northumberland Sir William de Ros 1288-1343 |
| 2nd Lord Ros, Knight of Helmsley and Hunsingore, Yorkshire, Wark, Northumberland Sir William de Ros | |
| B: | 1288 |
| Yorkshire, England | |
| M: | 25 Nov 1316 |
| Wark, Northumberland, England | |
| D: | 3 Feb 1343 |
| Yorkshire, England | |
| Maud de Badlesmere 1310-1366 |
| Maud de Badlesmere | |
| B: | 1310 |
| Badlesmere, Kent, England | |
| D: | 23 May 1366 |
| Earls Colne, Essex, England | |
 | 7th Earl of Oxford John de Vere 1311-1360 |
| 7th Earl of Oxford John de Vere | |
| B: | 12 Mar 1311 |
| Oxfordshire, England | |
| M: | 24 Mar 1335 |
| Badlesmere, Kent, England | |
| D: | 24 Jan 1360 |
| Rheims, Marne, Champagne-Ardenne, France | |
 | Baroness Badlesmere Margaret de Clare 1287-1333 |
| Baroness Badlesmere Margaret de Clare | |
| B: | 1 Apr 1287 |
| Bunratty, Clare, Ireland | |
| D: | 3 Jan 1333 |
| London, England | |
 | 1st Baron de Badlesmere Bartholomew de Badlesmere Abt 1275-1322 |
| 1st Baron de Badlesmere Bartholomew de Badlesmere | |
| B: | Abt 1275 |
| Badlesmere, Kent, England | |
| M: | 30 Jun 1308 |
| D: | 14 Apr 1322 |
| Canterbury, Kent, England | |
| Lord of Inchiquin and Youghal - Lord of Thomond Thomas de Clare | |
| B: | 1245 |
| Tonbridge, Kent, England | |
| D: | 29 Aug 1287 |
| Clare County, Ireland | |
 | Juliana FitzGerald 1263-1300 |
| Juliana FitzGerald | |
| B: | 1263 |
| Dublin, Ireland | |
| D: | 24 Sep 1300 |
| Clare County, Ireland | |
 | Baroness Berkeley Elizabeth de Spenser Abt 1327-1389 |
| Baroness Berkeley Elizabeth de Spenser | |
| B: | Abt 1327 |
| Stoke Albany, Northamptonshire, England | |
| D: | 13 Jul 1389 |
| Thornbury, Gloucestershire, England | |
 | 4th Lord Berkeley Maurice Berkeley 1330-1363 |
| 4th Lord Berkeley Maurice Berkeley | |
| B: | 1330 |
| Berkeley, Gloucestershire, England | |
| M: | Aug 1338 |
| D: | 1363 |
| suo jure 6th Lady of Glamorgan Eleanor de Clare | |
| B: | 3 Oct 1292 |
| Glamorgan, Wales | |
| D: | 30 Jun 1337 |
| Tewkesbury, Gloucestershire, England | |
| 1st Lord Despenser and Lord of Glamorgan Hugh Despenser, the Younger | |
| B: | 1 May 1286 |
| Gloucestershire, England | |
| M: | May 1306 |
| Westminster, Middlesex, England | |
| D: | 24 Nov 1326 |
 | Elizabeth de Verdun 1306-1377 |
| Elizabeth de Verdun | |
| B: | 1 May 1306 |
| Alton, Staffordshire, England | |
| D: | 1377 |
| Sussex, England | |
 | Bartholomew de Burghersh 1287-1355 |
| Bartholomew de Burghersh | |
| B: | 1287 |
| Sussex, England | |
| D: | 3 Aug 1355 |
| Isabel de Verdun 1315-1349 |
| Isabel de Verdun | |
| B: | 21 Mar 1315 |
| Amesbury, Wiltshire, England | |
| D: | 25 Jul 1349 |
| Groby, Leicestershire, England | |
| 2nd Lord Ferrers of Groby Henry de Ferrers | |
| B: | 1303 |
| Groby, Leicestershire, England | |
| M: | Bef 20 Feb 1331 |
| D: | 15 Sep 1343 |
| Groby, Leicestershire, England | |
 | Elizabeth de Clare 1295-1360 |
| Elizabeth de Clare | |
| B: | 16 Sep 1295 |
| Tewkesbury, Gloucestershire, England | |
| D: | 4 Nov 1360 |
| Ware, Hertfordshire, England | |
| Theobold de Verdun 1278-1316 |
| Theobold de Verdun | |
| B: | 8 Sep 1278 |
| Cheadle, Staffordshire, England | |
| D: | 27 Jul 1316 |
| Alton, Staffordshire, England | |
 | Baroness Neville Alice de Audley 1300-1374 |
| Baroness Neville Alice de Audley | |
| B: | 1300 |
| Hadley End, Staffordshire, England | |
| D: | 11 Jan 1374 |
| Northumberland, England | |
| 2nd Baron Neville de Raby Ralph de Neville | |
| B: | 1291 |
| Durham, England | |
| M: | 14 Jan 1327 |
| Stratton Audley, Oxfordshire, England | |
| D: | 5 Aug 1367 |
| Durham, Durham, England | |
 | 2nd Baroness Audley Margaret de Audley 1305-1347 |
| 2nd Baroness Audley Margaret de Audley | |
| B: | Jan 1305 |
| Stafford, Staffordshire, England | |
| D: | 7 Sep 1347 |
| Tonbridge, Kent, England | |
 | 1st Earl of Stafford Ralph de Stafford 1301-1372 |
| 1st Earl of Stafford Ralph de Stafford | |
| B: | 24 Sep 1301 |
| Tonbridge, Kent, England | |
| M: | 6 Jul 1336 |
| D: | 31 Aug 1372 |
| Tonbridge, Kent, England | |
 | Countess of Cornwall Margaret de Clare 1292-1342 |
| Countess of Cornwall Margaret de Clare | |
| B: | 12 Oct 1292 |
| Tewkesbury, Gloucestershire, England | |
| D: | 9 Apr 1342 |
| Badlesmere, Kent, England | |
| 1st Earl of Gloucester Hugh de Audley, II | |
| B: | 1289 |
| Oxfordshire, England | |
| M: | 28 Apr 1317 |
| D: | 10 Nov 1347 |
| Tonbridge, Kent, England | |
 | 1st Earl of Cornwall Piers Gaveston Abt 1284-1312 |
| 1st Earl of Cornwall Piers Gaveston | |
| B: | Abt 1284 |
| France | |
| M: | Oct 1307 |
| D: | 19 Jun 1312 |
| 7th Earl of Gloucester, Earl of Clare, Earl of Hertford Lord Gilbert de Clare, IV | |
| B: | 2 Sep 1243 |
| Christchurch, Hampshire, England | |
| D: | 7 Dec 1298 |
| Monmouthshire, Wales | |
| Princess of England Joan of Acre Plantagenet | |
| B: | 1272 |
| Israel | |
| M: | 30 Apr 1290 |
| Westminster, London, England | |
| D: | 23 Apr 1307 |
| Clare, Suffolk, England | |
|
| Maud de Lacy 1223-1289 |
| Maud de Lacy | |
| B: | 25 Jan 1223 |
| Lincoln, Lincolnshire, England | |
| D: | 10 Mar 1289 |
| Lincoln, Lincolnshire, England | |
| Eighth Earl of Clare, Sixth Earl of Hertford, 6th Earl of Gloucester Richard de Clare, IV | |
| B: | 4 Aug 1222 |
| England | |
| M: | 2 Feb 1238 |
| D: | 14 Jul 1262 |
| Waltham, Kent, 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.
