Achternamen
| Achternaam | Aantal |
|---|---|
| Kortsmit | 1 |
| Kortstee | 1 |
| Kortsten | 1 |
| Korven | 1 |
| Korven, van | 4 |
| Körver | 36 |
| Körvers | 21 |
| Korvorst | 1 |
| Korzelius | 1 |
| Kos | 3 |
| Kosack | 1 |
| Kosatka | 1 |
| Kosemans | 1 |
| Koslowski | 2 |
| Kosman | 8 |
| Kosmann | 2 |
| Kosse | 2 |
| Kossen | 3 |
| Kossmann | 1 |
| Kost | 2 |
| Kosten | 1 |
| Koster | 51 |
| Koster, de | 11 |
| Kosterman | 5 |
| Kostermans | 3 |