Joan (Catalaanse)
Giovanni (Italiaanse)
Jovanni (Engelse)
Johann (Duitse)
Ja-, Jay, Jai, Jae, Joe, Joey, Jo
Joab, Jeno, Jino, Jago, Jaq, Jak, Jaco, Jaap, Jock, Jan, Jano, Jean, Jiro, Joash, Job, Joby, Jobe, Jocko, Jody, Jodi, Joed, Joel, Juan, Jona, Jon, Jian, Jonn, Jonah, Jory, Jori, Jose, Joss, Joos, Joop, Josh, Jovi, Jove, Kojo, Noah
Iefan, Ieuan, Ifan, Siôn, Jon, Juan, Janez, Jovan, Ian, Iain, Ioann, Ioan, Iancu, Ionel, Iwan, Ean, Jonas, Janis, Eoin, Sean, János, Keoni, Ioannis, Yannis, Xoán, Jani, Juhana, Juha, Jouni, Juhani, Joni, Jussi, Juho, Hannu, Jukka, Jochjo, Johano, Hank,