| Name | Role | Place | Source | |
|---|---|---|---|---|
| G. Gruber | Travelers | 1953 | Rotterdam | Passenger registers |
| G. Gruber | Travelers | 1954 | Rotterdam | Passenger registers |
| G. Gruber | Travelers | 1955 | Rotterdam | Passenger registers |
| G. Gruber | Travelers | 1940 | Rotterdam | Passenger registers |
| G. Gruber | Travelers | 1962 | New York | Passenger registers |
| G. Gruber-Schnek | Travelers | 1950 | Passenger registers | |
| G. Gruber-Schnek | Travelers | 1950 | Rotterdam | Passenger registers |
| J. G. Gruber | Registered | 1800 | Amsterdam | Church records burials |
| Richard G. Gruber | Travelers | 1927 | New Orleans | Passenger registers |
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