- Kabir
- Kaczorowski
- Kafkakis
- Kahn
- Kaigler
- Kaller
- Kalota
- Kamm
- Kane
- Kanski
- Kaplan
- Karaszewski
- Kasprzyk
- Kavanaugh
- Keeling
- Keene
- Keener
- Keese
- Kegler
- Kein
- Keith
- Keller
- Kelley
- Kellogg
- Kelly
- Kelsey
- Kemp
- Kendrick
- Kendricks
- Keneau
- Kennary
- Kennedy
- Kent
- Kermans
- Kerridge
- Kerwood
- Key
- Keyes
- Keys
- Khatana
- Kiehler
- Kierpaul
- Kilgore
- Killeen
- Killen
- Kimball
- Kimbel
- Kimbrough
- Kincaid
- King
- Kingsley
- Kinney
- Kinsey
- Kinslow
- Kirby
- Kirk
- Kirkland
- Kirksey
- Kirtz
- Kiser
- Kitchen
- Kittrell
- Kjellberg
- Klann
- Kleiner
- Kleinert
- Klimek
- Kline
- Klugh
- Kmetz
- Knall
- Knapper
- Knasiak
- Kneeshaw
- Kneller
- Knight
- Knighton
- Knoll
- Knop
- Knott
- Knowles
- Knowlton
- Knox
- Koger
- Kohn
- Kokoszki
- Koller
- Komajda
- Kondratko
- Kooari
- Koonce
- Koons
- Kopchia
- Kopek
- Kopski
- Kopy
- Kormanik
- Korpi
- Koscielny
- Kossakowski
- Kotsogiannidis
- Kouassi
- Koukal
- Kowalski
- Kraft
- Kramer
- Krause
- Krawcke
- Kreski
- Krieger
- Krisel
- Kritzman
- Krol
- Kropik
- Krugel
- Krupa
- Krystyan
- Kubek
- Kubitski
- Kucharski
- Kudek
- Kuper
- Kurrie
- Kurtz
- Kushmar
- Kuta
- Kuykendall
- Kyles
- Kyser