| Children |
| | 1. Reginald De FIENNES, b. Abt 1229, Of, Wendover, Buckinghamshire, England d. Aft 1270 (Age > 42 years) |
| | 2. Maud De FIENNES, COUNTESS OF HEREFORD AND ESSEX, b. Abt 1231, Of, Wendover, Buckinghamshire, England d. 6 Nov 1298 (Age 67 years) |
| | 3. Robert De FIENNES, Lord of Heuchin, b. Abt 1233, , , , France d. Yes, date unknown |
| | 4. Enguerrand FIENNES, b. Abt 1235, <, , , France> d. Yes, date unknown |
| | 5. William de FIENNES, b. Abt 1245, , Wendover, Buckinghamshire, England d. 11 Jul 1302, Courtral, Flandre, Occidential, Belgium (Age 57 years) |
| | 6. Giles De FIENNES, KNIGHT, b. Abt 1250, Of, Wendover, Buckinghamshire, England d. 1293 (Age 43 years) |
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