Iefan, Ifan, Siôn, Ieuan, Jon, Juan, Janez, Jovan, Ian, Iain, Ivan, Ioann, Ioan, Iancu, João, Iwan, Ean, Jonas, Janis, Eoin, Sean, János, Keoni, Ioannis, Yannis, Xoán, Jani, Juhana, Juha, Joni, Jouni, Hannu, Juhani, Juho, Jussi, Jukka, Jochjo, Johano,