Family: John Isaac / Cecily Hersing (F9930)
m. 1412
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 | John Isaac (1350-1419)
|
 | Agnes Grubbe (1355-1426)
|
| James Hersing (1360-1415)
|
| Joane de Retling (1365- ) |
| John Isaac (1380-1443)
|
| Cecily Hersing (1385-1443)
|
| John Isaac (1422-1501)  |