1200 - 1240 (39 years)
| Agnes de Clare | |
| B: | 1218 |
| England | |
| Countess of Devon Amice de Clare | |
| B: | Abt 1220 |
| Yorkshire, England | |
| D: | 21 Jan 1287 |
| Yorkshire, England | |
| Gilbert de Clare | |
| B: | 02 Sep 1243 |
| Christchurch, Hampshire, England | |
| D: | 07 Dec 1295 |
| Monmouth, Monmouthshire, Wales | |
| Joan Plantagenet | |
| B: | Apr 1272 |
| Acre, Palestine | |
| M: | 30 Apr 1290 |
| Westminster Abbey, Westminster, Middlesex, England | |
| D: | 23 Apr 1307 |
| Clare Castle, Clare, Ireland | |
| 8th Baron Mowbray John de Mowbray | |
| B: | 04 Sep 1286 |
| England | |
| D: | 23 Mar 1322 |
| York, Yorkshire, England | |
| Aline de Braose | |
| B: | 1291 |
| England | |
| D: | Bef 20 Jul 1331 |
| Bramber, Sussex, England | |
| Rose de Clare | |
| B: | Abt 1255 |
| England | |
| D: | Aft 1316 |
| Hovingham, Yorkshire, England | |
| 7th Baron Mowbray Roger de Mowbray | |
| B: | 1254 |
| Yorkshire, England | |
| D: | 21 Nov 1297 |
| Ghent, Belgium | |
| 6th Earl of Gloucester Richard de Clare | |
| B: | 04 Aug 1222 |
| Clare Castle, Clare, Suffolk, England | |
| D: | 14 Jul 1262 |
| Waltham, Kent, England | |
| Lady of Annandale Isabel de Clare | |
| B: | 02 Nov 1226 |
| Tewkesbury, Gloucestershire, England | |
| D: | 10 Jul 1264 |
| 5th Lord of Annandale Robert de Brus | |
| B: | 1215 |
| D: | 31 Mar 1295 |
| Lochmaben, Dumfries-shire, Scotland | |
| William de Clare | |
| B: | Abt 1228 |
| England | |
| D: | 1258 |
| Gilbert de Clare | |
| B: | 1229 |
| England | |
| Countess Isabel Marshal | |
| B: | 09 Oct 1200 |
| Pembroke Castle, Pembrokeshire,Wales | |
| D: | 17 Jan 1240 |
| Berkhamsted Castle, Berkhamsted, Hertfordshire, England | |
| 4th Earl of Hertford Gilbert de Clare | |
| B: | Abt 1180 |
| Hertford, Hertfordshire, England | |
| M: | 09 Oct 1217 |
| Tewkesbury Abbey, Tewkesbury, Gloucestershire, England | |
| D: | 25 Oct 1230 |
| Brittany, France | |
| 1st Earl of Cornwall Richard Plantagenet | |
| M: | 30 Mar 1231 |
| Fawley Church, Fawley, Buckinghamshire, England | |
