Familie: Maassen, Hans / Vennekohl, Ester M. (F273)
 | Vennekohl, Robert Helmuth (1862-1924) |
 | Rottmann, Minnie (1869-1955) 
|
 | Vennekohl, Selma Minnie (1893-1971)  |
| Vennekohl, Robert Helmuth (1899-1969) |
 | Vennekohl, Carl Herman (1902-1957) |
 | Vennekohl, Ester M. (1895-1980)
|
| Maassen, Hans (1895- ) |