| Name | Role | Place | Source | |
|---|---|---|---|---|
| C. Kinker-v.d. Gaag | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| C. v.d. Gaag | Travelers | 1950 | New York | Passenger registers |
| C. v.d. Gaag | Travelers | 1955 | New York | Passenger registers |
| C. v.d. Gaag | Signatory | 1878 | 's-Gravenhage | Verzoekschriften |
| C. v.d. Gaag | Travelers | 1959 | New York | Passenger registers |
| C. v.d. Gaag | Travelers | 1961 | New York | Passenger registers |
| Pieter C. [v.d.] Gaag | Deceased | Amsterdam | Church records burials |
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