| Name | Total | Name | Total |
|---|
| Koldewaayer | 1 | Koopmans | 69 |
| Koldewayer | 5 | Koopstra | 1 |
| Koldeweijer | 2 | Koorsen | 1 |
| Koldeweyer | 1 | Kooten | 3 |
| Kolk | 4 | Kooten, van | 1 |
| Kolk, van der | 14 | Kooy | 7 |
| Kolk, van de | 1 | Kooy, van der | 1 |
| Kolkena | 5 | Kooyker | 3 |
| Köllmann | 2 | Kooyker (Kooy) | 1 |
| Kolman | 2 | Kooyman | 2 |
| Kolmer | 2 | Kop | 1 |
| Kolmeyer | 1 | Koppenrade | 16 |
| Kolthoff | 1 | Koremans | 1 |
| Kolwayer | 1 | Korenstra | 7 |
| Kolweyer | 3 | Korf | 1 |
| Komar | 1 | Korfage | 2 |
| Komdeur | 1 | Kornelisma | 1 |
| Kommerkamp | 1 | Korpershoek | 1 |
| Kommers | 1 | Korporaal | 1 |
| Koniecznij | 1 | Korst, van der | 1 |
| Konig | 2 | Korteman | 1 |
| Koning | 28 | Kortendiek | 1 |
| Koning, de | 2 | Kortendijk | 6 |
| Koning ter Hege | 1 | Kortenhorst | 5 |
| Konneman | 1 | Kortermeulen | 1 |
| Konst | 103 | Kortooms | 1 |
| Konter | 2 | Kortrijk | 31 |
| Kooi | 5 | Kortstra | 4 |
| Kooi, van der | 5 | Köss | 2 |
| Kooi, van de | 1 | Koster | 11 |
| Kooij, van de | 1 | Koten | 1 |
| Kooijenga | 2 | Kötter | 2 |
| Kooijman | 1 | Koulshoff | 1 |
| Kooiker | 42 | Kouwenberg | 1 |
| Kooiker (Kooy) | 2 | Kouwenburg | 3 |
| Kooiker (Kooy) | 1 | Kouwenhoven | 4 |
| Kooiman | 2 | Kräemer | 2 |
| Kooistra | 9 | Kraft | 7 |
| Kool | 1 | Kragt | 2 |
| Koolen | 1 | Kragtwijk | 1 |
| Koolhaas | 1 | Kram | 1 |
| Koolhof | 1 | Kramer | 132 |
| Koolstra | 2 | Kramers | 11 |
| Koolwijk, van | 1 | Krammer | 1 |
| Koomen | 2 | Kranendonk | 1 |
| Koonstra | 4 | Kreike | 1 |
| Koop | 1 | Kreimer | 1 |
| Koopal | 4 | Krekelaar | 11 |
| Koopman | 5 | Krekelberg | 1 |
| Koopmanns | 1 | Krekt | 2 |
