| Name | Role | Place | Source | |
|---|---|---|---|---|
| Cornelis J. Groh | Registered | 1855 | Utrecht | Register of staff |
| Cornelis J. Groh | Staff member | 1855 | Utrecht | Register of staff |
| Cornelis J. Groh | Registered | 1855 | Utrecht | Register of staff |
| J. Groh | Registered | 1861 | Tiel | Population register |
| J. Groh | Registered | 1877 | Tiel | Population register |
| J. Groh | Registered | 1861 | Tiel | Population register |
| J. Groh | Travelers | 1953 | Passenger registers | |
| J. Groh | Registered | 1877 | Tiel | Population register |
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