Familie: Johannes Habbo Gerdes / Martha Koch (F45)
 | Gerd Harms Gerdes (1880-1952) 
|
 | Wilhelmine Hilkedine Janßen (1884-1924)
|
Wilhelm Johann Gerdes (1904-1945)  |
 | Johann Heyo Gerdes (1906-1986) |
 | Heyo Gerdes (1908-1990) |
 | Theodor Heinrich Gerdes (1909-1944) |
 | Georg Theodor Gerdes (1911-1943) |
| Johannes Habbo Gerdes (1913-1989)
|
| Martha Koch (1920-2008) |
