| Name | Role | Place | Source | |
|---|---|---|---|---|
| Wolf Singer | Travelers | 1907 | Rotterdam | Passenger registers |
| Wolf Singer | Travelers | 1904 | Rotterdam | Passenger registers |
| Wolf Singer | Travelers | 1913 | New York | Passenger registers |
| Wolf Singer | Travelers | 1939 | Rotterdam | Passenger registers |
| Wolf Singer | Previous partner bride | 1924 | 's-Gravenhage | Civil registration marriages |
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