- Jaca
- Jacinta
- Jacinto
- Jack
- Jackes
- Jackson
- Jaco
- Jacob
- Jacobelli
- Jacobs
- Jacome
- Jacque
- Jacqueline
- Jacques
- Jacquet
- Jaeger
- Jaen
- Jafar
- Jaga
- Jager
- Jahn
- Jaime
- Jain
- Jakob
- Jakubowicz
- Jal
- Jalal
- Jalali
- Jalba
- Jales
- Jalo
- Jaloto
- Jamal
- Jamanca
- Jamba
- James
- Jamir
- Jan
- Jana
- Jandira
- Jane
- Janeiro
- Janes
- Janet
- Janete
- Jang
- Janica
- Janota
- Jansen
- Janson
- Janssen
- Janssens
- Januario
- Janz
- Jaqueline
- Jaques
- Jara
- Jardim
- Jardin
- Jardine
- Jardins
- Jaria
- Jarreta
- Jarro
- Jarvis
- Jasse
- Jassi
- Jau
- Jauad
- Jaura
- Javier
- Jawad
- Jean
- Jean-pierre
- Jeanne
- Jeca
- Jeffrey
- Jekabsone
- Jenkins
- Jennen
- Jennings
- Jenny
- Jensen
- Jeon
- Jeraldo
- Jeremias
- Jerez
- Jerome
- Jeronimo
- Jerusa
- Jervis
- Jessica
- Jessop
- Jesus
- Jezequel
- Jezus
- Ji
- Jian
- Jiang
- Jime
- Jimenez
- Jin
- Jindrich
- Jit
- Jiva
- Jivan
- Jo
- Joachim
- Joakim
- Joan
- Joanes
- Joanne
- Joannes
- Joao
- Joaquim
- Joaquin
- Joaquina
- Job
- Joe
- Joel
- Johansen
- Johansson
- John
- Johnny
- Johnsen
- Johnson
- Johnston
- Joia
- Jolley
- Jolly
- Joly
- Jon
- Jonas
- Jonatas
- Jones
- Jonet
- Jongen
- Jonh
- Jonkers
- Jonkman
- Jonsson
- Joosten
- Jora
- Jorda
- Jordan
- Jordo
- Jorg
- Jorge
- Jorges
- Joris
- Jorje
- Josan
- Jose
- Josef
- Josefa
- Josefino
- Joselia
- Joselina
- Joseph
- Joshi
- Joshua
- Jost
- Josu
- Jou
- Joubert
- Jourdain
- Jourdan
- Joy
- Joyce
- Ju
- Juan
- Juarez
- Juba
- Jucan
- Judas
- Judd
- Judeu
- Judice
- Judite
- Judith
- Juiz
- Jules
- Julia
- Julian
- Juliana
- Juliano
- Juma
- Junca
- Juncal
- Junco
- June
- Jung
- Junia
- Junio
- Junior
- Junot
- Junqueira
- Jurado
- Jurca
- Jurema
- Justa
- Juster
- Justin
- Justina
- Justiniano
- Justino
- Justo
- Juvandes
- Juvenal
- Juvencio