Children |
| 1. Marmaduke de Thwenge, b. 1274, Kilton Castle, Yorkshire, England , d. 25 Sep 1297, Battle of Stirling Bridge (Age 23 years) |
| 2. Sir William de Thweng, 2nd Lord Thwenge, b. Abt 1276, Kilton Castle, Yorkshire, England , d. 12 Mar 1340, Dsp (Ipm 6 Dec 1340) (Age ~ 64 years) |
| 3. Sir Robert de Thwenge, 3rd Lord Thwenge, b. 1277, Kilton Castle, Yorkshire, England , d. 11 May 1344, Dsp (Ipm 3 May 1344) (Age 67 years) |
| 4. Lucy de Thwenge, b. 1279, of Kilton Castle, Yorkshire, England , d. Aft 1325 (Age > 47 years) |
| 5. Sir Thomas de Thwenge, 4th Lord Thwenge, b. Abt 1283, Kilton Castle, Yorkshire, England , d. Jun 1374, Dsp (Ipm 25 Jun 1374) (Age ~ 91 years) |
| 6. John de Thwenge, Prior, b. 1284, of Bridlington , d. 19 Jan 1361 (Age 77 years) |
| 7. Katherine de Thwenge, b. Abt 1285, d. Aft 6 May 1364 (Age ~ 79 years) |
| 8. Nicholas Thwenge, b. 1286 |
| 9. Alice de Thwenge, b. Abt 1287 |
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