| Name | Role | Place | Source | |
|---|---|---|---|---|
| Josef Olszewski | Travelers | 1909 | Rotterdam | Passenger registers |
| Josef Olszewski | Travelers | 1912 | New York | Passenger registers |
| Josef Olszewski | Travelers | 1911 | Rotterdam | Passenger registers |
| Josef Olszewski | Father of bride | 1931 | Amsterdam | Civil registration marriages |
| Josef Olszewski | Travelers | 1921 | New York | Passenger registers |
| Josef Olszewski | Father of bride | 1933 | 's-Gravenhage | Civil registration marriages |
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