- Jack
- Jackemeyer
- Jackson
- Jacobs
- Jacobsen
- Jacobson
- Jagodzinski
- Jain
- James
- Jamili
- Janiszewski
- Janovyak
- Jansing
- Janson
- Janssen
- Jaquish
- Jarboe
- Jarmus
- Jasinski
- Jauregui
- Jaxtheheimer
- Jay
- Jefferies
- Jeffers
- Jehl
- Jemison
- Jenkins
- Jenne
- Jennings
- Jensen
- Jentgen
- Jervis
- Jesse
- Jessup
- Jewell
- Johansen
- Johns
- Johnson
- Johnsonbaugh
- Johnston
- Joiner
- Joley
- Jones
- Jordan
- Jorris
- Joseph
- Joshi
- Jost
- Jovevski
- Joyner
- Judd
- Judt
- Julius
- Jump
- Junk
- Jurss
- Justus