Familie: Siever, Karl Friedrich Heinrich / Vennekohl, Elisabeth Frieda Sylvia (F404)
verh. 11 Nov 1944 | Vennekohl, Heinrich Christian Louis (1877- ) 
|
 | Schlimme, Emilie Johanne Alvine (1887-1959) |
 | Vennekohl, Magdalena Hildegard Luise (1914-1996)  |
| Siever, Karl Friedrich Heinrich (1900-1970) |
 | Vennekohl, Elisabeth Frieda Sylvia (1915-1990)
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| Siever, Helga (1950- ) |
| Siever, Elisabeth (1951- ) |
| Siever, Gisela (1952- ) |