| Birkmann, Erich Willy | 1961 | ||
| Birkmann, Heinrich Wilhelm | 1945 | ||
| Birkmann, Johann | 1940 | ||
| Birkmann, Karl Heinrich | 1927 | ||
| Birkmann, Leonore Rosmarie | Meyer | Birkmann Alfred Heinz | 1971 |
| Birkmann, Louise Adele Auguste | Wührmann | Birkmann Johann | 1972 |
| Birkmann, Minna Bertha Emilie Martha | Schnettmann | Birkmann Karl Heinrich | 1927 |