| Name | Role | Place | Source | |
|---|---|---|---|---|
| C. Grob | Registered | Laren | ||
| C. Grob | Registered | Laren | ||
| C. Grob | Registered | Laren | ||
| C. Grob | Registered | Laren | ||
| Ernest C. Grob | Travelers | 1934 | Rotterdam | Passenger registers |
| Karel C. Grob | Registered | 1908 | Grave | Population register |
| Wilhelmina C. Grob | Registered | 1900 | Nijmegen | Population register |
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