| Name | # Entries |
|---|---|
| Kargel | 2 |
| Kargin | 5 |
| Karginoff | 1 |
| Kargian | 0 |
| Karhalainen | 0 |
| Kariacou | 1 |
| Karibalis | 2 |
| Karibian | 3 |
| Kariapuram | 2 |
| Karikis | 9 |
| Krillova | 0 |
| Krikmann | 1 |
| Krimhand | 2 |
| Krilis'''' | 7 |
| Krinberg | 1 |
| Krinelos | 3 |
| Krings | 3 |
| Kringsberg | 0 |
| Krinitzky | 0 |
| Krionas | 1 |
| Krinker | 1 |
| Krinninger | 1 |
| Kripp | 5 |
| Krips | 8 |
| Krisafi | 3 |
| Krischak | 0 |
| Krish | 2 |
| Krishna | 21 |
| Krischunas | 1 |
| Kereti | 1 |
| Kerezsi | 2 |
| Kerezovic | 1 |
| Kerin | 169 |
| Kittyea | 3 |
| Krein | 4 |
| Kreinberg | 3 |
| Kreibke | 1 |
| Kreidie | 1 |
| Kreidl | 5 |
| Kreig | 13 |
| Kreimer | 6 |
| Kreindl | 2 |
| Kreiselmaier | 0 |
| Kreisz | 1 |
| Krejak | 1 |
| Krejany | 3 |
| Krejc | 1 |
| Krejci | 16 |
| Krekora | 1 |
| Krel | 3 |
| Krekoukias | 1 |
| Karama | 0 |
| Karamacoski | 6 |
| Karamaina | 1 |
| Karamanis | 9 |
| Karamanavis | 2 |
| Karamanos | 6 |
| Karambelas | 17 |
| Karamanski | 1 |
| Karambinas | 3 |
| Karamemis | 1 |
| Kitchenham | 12 |
| Krellmann | 2 |
| Krememonvic | 1 |
| Kremers | 0 |
| Kremezis | 1 |
| Kremic | 1 |
| Kremmer | 25 |
| Kremser | 5 |
| Kremmydas | 2 |
| Kremzer | 1 |
| Krenak | 1 |
| Krenka | 1 |
| Krenn | 20 |
| Krenzer | 3 |