- Jack
- Jackins
- Jackson
- Jacky
- Jacobi
- Jacobin
- Jacobs
- Jacobsen
- Jacobson
- Jacoby
- Jacox
- Jacquemart
- Jacques
- Jade
- Jaderlund
- Jaeger
- Jaehning
- Jahn
- Jahns
- Jain
- Jainga
- Jaisun
- Jakubowski
- Jalbert
- Jamerson
- James
- Jameson
- Jamieson
- Jammal
- Janda
- Jandhyala
- Janes
- Janisse
- Jankanish
- Janney
- Janovich
- Janowicz
- Janssen
- Jaramillo
- Jardine
- Jarman
- Jarmick
- Jarrell
- Jarrett
- Jarriauld
- Jarvi
- Jarvis
- Jasper
- Jasperson
- Jassny
- Jasson
- Jaundalderis
- Javillonar
- Jayne
- Jazbec
- Jeakle
- Jeannette
- Jech
- Jedrzejewski
- Jefferson
- Jeffries
- Jehlik
- Jelonek
- Jeming
- Jendrick
- Jeniker
- Jenkins
- Jennings
- Jens
- Jensen
- Jepsen
- Jernberg
- Jernigan
- Jeske
- Jessen
- Jessup
- Jewell
- Jezick
- Jiang
- Jingling
- Jinneman
- Joaquin
- Jobe
- Jobes
- Joe
- Johansen
- Johanson
- John
- John-Der
- Johns
- Johnsen
- Johnson
- Johnston
- Johnstone
- Jollie
- Jonassen
- Jones
- Jongeward
- Jonientz
- Jonlin
- Jonsen
- Joppa
- Jordan
- Jorgensen
- Josam
- Josephson
- Jossy
- Jost
- Jostol
- Josund
- Joudeh
- Jovanovich
- Joyau
- Joyce
- Jozaitis
- Judd
- Judge
- Juds
- Judson
- Jue
- Juliano
- Julien
- June
- Jung
- Junge
- Juraskovich
- Jurcik
- Justam
- Justice
- Justus
- Jutte