| Kagi | |
| Kaiphas | |
| Kaste | |
| Keilholz | |
| Keim | |
| Keller | |
| Kellermann | |
| Kellner | |
| Kern | |
| Kessler | |
| Kiessig | |
| Kilian | |
| Kirchhof | |
| Kirsch | |
| Klann | |
| Klaus | |
| Klein | |
| Kleine | |
| Kloer | |
| Kluge | |
| Knoll | |
| Knorr | |
| Knust | |
| Kober | |
| Koch | |
| Köcher | |
| Köhler | |
| Koering | |
| Komma | |
| Koppe | |
| Kranz | |
| Krause | |
| Krauß | |
| Kreis | |
| Kreissig | |
| Kühn | |
| Künicke | |
| Kunz | |
| Kunze | |
| Kupfer | |
| Kuttner |