- Jablon
- Jackson
- Jacob
- Jacobs
- Jacobson
- Jacoby
- Jaeckel
- Jaeger
- Jaffe
- Jagger
- Jaime
- Jaivin
- Jakob
- James
- Jameson
- Jamil
- Jampol
- Jan
- Janatka
- Janet
- Janikian
- Jannol
- Janowiak
- Jansen
- Jao
- Jaques
- Jaramillo
- Jariol
- Jarvis
- Jaude
- Jauregui
- Javidzad
- Jay
- Jayawardhana
- Jeffries
- Jegalian
- Jenkins
- Jenkinson
- Jennrich
- Jensen
- Jerde
- Jeronimo
- Jeske
- Jessel
- Jessor
- Jezek
- Jijon
- Jiles
- Jimbo
- Jimenez
- Jimerson
- Jivani
- Joa
- Joe
- Johannsen
- Johansen
- John
- Johnson
- Johnson-Blake
- Johnston
- Joiner
- Jonelis
- Jones
- Jong
- Jorda
- Jordan
- Jorgen
- Jorgensen
- Joseph
- Joung
- Joven
- Juarez
- Jue
- Juknavorian
- Julian
- Julien
- Juma
- Jun
- Juncal
- Juniel
- Jurado
- Jurczewsky
- Jurilla
- Jurmann