- Jabloner
- Jacklitch
- Jackson
- Jacob
- Jacobs
- Jacobson
- Jacobus
- Jacoby
- Jae
- Jaeger
- Jaegers
- Jaffee
- Jahnz
- Jaime
- Jakimowich
- Jako
- Jalbert
- James
- Jamieson
- Jancek
- Janes
- Janezic
- Jank
- Janney
- Jannuzi
- Jansen
- Jansma
- Janson
- Janssen
- Janu
- Jaquette
- Jaquez
- Jaquith
- Jarchow
- Jarecki
- Jarred
- Jarrold
- Jarvis
- Jaskela
- Jaskoski
- Jason
- Jassman
- Jaworski
- Jay
- Jean
- Jeffalone
- Jefferies
- Jeffery
- Jeffrey
- Jenkins
- Jenks
- Jennings
- Jensen
- Jenson
- Jenter
- Jentoft
- Jents
- Jeppson
- Jerden
- Jernigan
- Jessee
- Jessen
- Jester
- Jhames
- Jimenez
- Jindracek
- Joaquin
- Johnsen
- Johnson
- Johnson-Farrand
- Johnston
- Johnstone
- Jolivet
- Jolley
- Joly
- Jonczyk
- Joneikis
- Jones
- Joplin
- Jordal
- Jordan
- Jorge
- Jorgensen
- Jorgenson
- Jorquera
- Joseph
- Josephson
- Joy
- Juarez
- Juchnowski
- Juday
- Judevine
- Judge
- Judin
- Juhan
- Julien
- June
- Juntiff
- Jurado
- Jurmain
- Jurta
- Justus