Jonathan: I am Jonathan Joestar, but you can call me JoJo.

Joseph: Well Hi! I'm Joseph Joestar! But you can call me Jojo!

Jotaro: I am Jotaro Kujo, Yare Yare Daze.

Josuke: Hello, I am Josuke Higashikata.

Giorno: I, Giorno Giovanna, have a dream

Jolyne: Hey. I'm Jolyne, yeah. Don't call me Jojo. Do not call me Jojo. Do I know you?

Johnny: I am Johnny Joestar, a former jocky from Kentucky, and a user of the spin.

Jodio: Uh... Yo? I'm Jodio Joestar!