Achternamen
| Achternaam | Aantal |
|---|---|
| Kösters | 72 |
| Kostjens | 19 |
| Kostons | 11 |
| Kostrzewa | 1 |
| Kostwinder | 1 |
| Koszyk | 1 |
| Koten | 28 |
| Kotenko | 1 |
| Koter, de | 1 |
| Kothuis | 1 |
| Kotkamp | 3 |
| Kotlewski | 1 |
| Kotte | 2 |
| Kötter | 1 |
| Kotzur | 1 |
| Koudijs | 1 |
| Kouijzer | 2 |
| Koullen | 8 |
| Koumans | 32 |
| Koursil | 1 |
| Kourtakis | 1 |
| Kousemaker | 1 |
| Kousen | 7 |
| Kouteren, van | 1 |
| Kouters | 8 |