| Name | Role | Place | Source | |
|---|---|---|---|---|
| M. Berstein-Heumann | Registered | 's-Gravenhage, Soest | Management file | |
| M. Heumann | Travelers | 1956 | New York | Passenger registers |
| M. Heumann | Travelers | 1956 | New York | Passenger registers |
| M. Heumann | Travelers | 1969 | Rotterdam | Passenger registers |
| M. Heumann | Laatstelijk gehuwd | 1943 | Sobibor | Dutch Government Gazette |
| M. Heümann | Registered | 1897 | Amsterdam | Family cards |
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