- Jabronski
- Jack
- Jackson
- Jacob
- Jacobs
- Jacobson
- Jacyszyn
- Jadallah
- Jadue
- Jakovina
- Jakubec
- Jakubek
- James
- Jamieson
- Jamison
- Janecko
- Janik
- Janis
- Jankiewicz
- Janovick
- Jara
- Jardien
- Jarosz
- Jarvis
- Jasinski
- Jasper
- Jaszyn
- Jay
- Jefferson
- Jeitz
- Jendre
- Jenkins
- Jennings
- Jensen
- Jessop
- Jeswald
- Jickess
- Joachim
- Joerndt
- Johngrass
- Johns
- Johnson
- Johnston
- Johnstone
- Jonda
- Jone
- Jones
- Jonesco
- Jonner
- Jordan
- Jordon
- Joseph
- Jovanovich
- Joy
- Joyce
- Jubak
- Judd
- Judis
- Judy
- Julian
- Julius
- Jupp
- Jursa
- Juruaz
- Justice