- J.R. Herky Longfellow
- Jasper
- Jayme
- Jenny
- Jodi
- Jazz
- Josie
- Jumanji
- Jethroe
- Joey
- Jessie
- Jinx
- Jackie
- Jaahl (born by the sea)
- Jenn
- Jacques
- Jayni
- June Bug
- Joy
- JuJu
- JuJu Bea
- Jan
- Jewel
- Jaba
- Jackson
- Jadzia Dax
- Jagermeister
- Jade
- Joe
- Jolene
- Jovi
- JD (just dog)
- JD (JackDaniels)
- JC (just cat)
- JB (just bird)
- Junior
- Jack
- Jasmine
- Jingles
- Juneau
- Jabbock
- Jess
- Jondalar
- Janie
- Jax
- Jolly
- Jessa
- Jynx
- Jumper
- Jocco
- Jamal
- Jean Luc
- Jeeter
- Jethro
- Jester
- Jaffa
- Jake
- Justin
- Juliet
- Jellybean
- Joupe
- Joshuntally
- Jua
- Jello
- Jiggles
- James
- Jenna
- Jebadiah
- Jigger
- Jezebel
- Jacob
- Julian
- JuJitzo
- Jigglypuff
- Justice
- Jobey
- Jeeves
- Jiggly
- Jilly
- JoBu
- Juve
Great J Names For Your Cat
