Familie: Rolf Köster / Anna Johanna Gerdes (F36)
verh. 1 Nov 1950 | Gerd Harms Gerdes (1880-1952) 
|
 | Anna Margarete Rüstmann (1902-1990)
|
| Gretchen Anna Johanna Gerdes (1929-1930) |
 | Heinrich Diedrich Gerdes (1926-2020)  |
| Adda Jesine Gerdes (1934-1935) |
 | Adolf Hermann Gerdes (1935-2025) |
 | Insine Gerdes (1941-2024) |
 | Anna Johanna Gerdes (1932-2009)
|
| Bernhard Köster (1953-2019) |
| Carola Köster (1958-2022) |