| Name | Prefix Title | Suffix Title | (Birth-Death) | Relationship | General |
|---|---|---|---|---|---|
| William III d' Albini | Lord of Belvoir | >1146-1232 | 23G Grandfather | Of Belvoir castle. Governor of Rochester castle. | |
| Hugh Bigod | Earl of Norfolk | -<1224 | 22G Grandfather | 3rd earl. A witness to the 1225 Magna Carta confirmation. | |
| Roger Bigod | Earl of Norfolk | -<1221 | 23G Grandfather | 2nd earl. A judge in the King's court. | |
| Henry de Bohun | Earl of Hereford | 1176-1220 | 23G Grandfather | 1st Bohun earl: 1200. Supported barons re Gt Charter. | |
| Gilbert de Clare | Earl of Gloucester | ca1180-1230 | 22G Grandfather | 7th Clare earl. 4th earl of Gloucester. 1st Husband. | |
| Richard de Clare | Earl of Hertford | ca1162-<1217 | 23G Grandfather | 3rd earl. More usually: earl of Clare. | |
| John FitzRobert | -1241 | 22G Grandfather | Feudal baron of Warkworth and Clavering. | ||
| Robert II FitzWalter | Lord of Dunmow | -1235 | 24G Grandfather | Of Woodham Walter, Essex. | |
| William de Forz | Count of Aumale | -1241 | 3C22R | Governor of several castles. | |
| William de Huntingfield | -1220 | 25G Grandfather | Baron of Magna Carta. Of Frampton castle, Lincoln. Judge. | ||
| John de Lacy | Earl of Lincoln | ca1192-1240 | 22G Grandfather | 1st earl: 1232. Sheriff of Cheshire in 1237 and 1240. | |
| William de Lanvellei | Lord of Stanway | -1217 | 25G Grandfather | Of Stanway castle, Essex. Governor of Colchester castle. | |
| William (II) Malet | Sir | Lord of Curry Mallet | ca1180-ca1215 | 23G Grandfather | Sheriff of Somerset & Dorset. |
| Geoffrey de Mandeville | Earl of Essex | -1216 | 22G Uncle | dsp. 4th earl. Also earl of Gloucester de jure uxoris. | |
| William Marshal | Earl of Pembroke | ca1190-1231 | 23G Uncle | 5th earl. dsp. Marshal of England. Justiciar of Ireland. | |
| Roger de Montbegon | -ca1226 | Half 24G Uncle | dsp. Deserted barons after 1 yr, resigned as surety. | ||
| Richard de Montfichet | ca1193-ca1268 | 23G Uncle | d.unm. dsp. Justice of the king's Forests. Sheriff of Essex. | ||
| William de Mowbray | Lord of Mowbray | -<1224 | 23G Grandfather | Received Stuteville lands, lost Mowbray Norman lands. | |
| Richard de Percy | ca1170-ca1244 | 23G Uncle | 2nd s but 1st surv. 5th feudal baron. A justice at York. | ||
| Saher IV de Quency | Earl of Winchester | 1155-1219 | 23G Grandfather | 1st earl. Possibly the author of the Magna Carta. | |
| Robert de Ros | ca1170-<1226 | 23G Grandfather | Sheriff of Cumberland. Governor of Carlisle. | ||
| Geoffrey (II) de Say | ca1180-<1230 | 23G Grandfather | 2nd s. but 1st surv. Of Rochester castle. Mag Cart surety. | ||
| Robert de Vere | Earl of Oxford | >1164-<1221 | 23G Grandfather | 3rd s. 3rd earl. Regularly combined vs John. | |
| Eustace de Vescy | ca1170-1216 | 1C25R | Negotiated with William the Lion on behalf of K. John. |
There were originally 25 sureties. Only one, William de Hardell, is not in this database as he was neither an ancestor, nor a relation, nor an in-law.
Of the 22 on the above list, 17 are ancestors and 5 are relations of ancestors. Additionally there were 2 who were in-laws to these.