Paris - Île-de-France
- Joya
- Joyce
- Joyeau
- Jozeau
- Juban
- Juglar
- Juguet
- Juhan
- Juigne
- Juignet
- Juliard
- Jullion
- Jumayeth
- Jumelle
- Junchat
- Jungels
- Jupille
- Juranville
- Juredieu
- Jurgensen
- Jus
- Jusseaume
- Justice
- Juston
- Jutard
- Jutteau
- Kaabeche
- Kaas
- Kabou
- Kacel
- Kadouch
- Kageyama
- Kahale
- Kai
- Kairouz
- Kais
- Kakal
- Kako
- Kalach
- Kalamperovic
- Kallo
- Kalman
- Kalonji
- Kamen
- Kamgang
- Kamir
- Kamiyama
- Kamoudi
- Kamsu
- Kanda
- Kandemir
- Kaneda
- Kanga
- Kanno
- Kanon
- Kanoun
- Kanza
- Kanzari
- Kaoutar
- Kapadia
- Karacostas
- Karahan
- Karakaya
- Karani
- Karar
- Karayannis
- Kardous
- Kareche
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- Karki
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- Kassas
- Kassel
- Kassi
- Katagiri
- Kati
- Katir
- Katlama
- Katra
- Kausmally
- Kauv
- Kawasaki
- Kayali
- Kazadi
- Kchaou
- Keane
- Kebbab
- Kebdi
- Keenan
- Kehr
- Kemayou
- Kemel
- Kemp
- Kendall
- Kenza
- Keogh
- Kerba
- Kerbellec
- Kerber
