Nielsen Hayden genealogy
Robert de Mankesey
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Thomas de Lewknor
1271-Bef 1336
| Thomas de Lewknor | |
| B: | Between 1270 and 1271 |
| D: | Bef 22 Mar 1336 |
Sibyl
-Aft 1336
| Sibyl | |
| B: | of South Mimms, Middlesex, England |
| D: | Aft 22 Mar 1336 |
Roger de Lewknor
1246-Bef 1295
| Roger de Lewknor | |
| B: | Between 1244 and 1246 |
| of South Mimms, Middlesex, England | |
| D: | Bef 24 Sep 1295 |
Richard de Keynes
Abt 1228-1295
| Richard de Keynes | |
| B: | Abt 1228 |
| of Horsted Keynes, Sussex, England | |
| D: | Between 1276 and 1295 |