| Czech Republic | Jan |
| Denmark | Sankt Hans dag |
| Estonia | Annes, Ants, Hannes, Hans, Jaan, Jan, Janek, Janno, Johan, Johannes, Juhan, Juho, Jukk, Juss |
| Finland | Jani, Janne, Johannes, Juha, Juhana, Juhani, Juho, Jukka, Jussi |
| Finland-Swedish | Ian, Jack, Jan, Janne, Jean, Jens, Johan, Johannes, John, Johnny, Jon |
| France | Jean-Baptiste |
| Hungary | Iván |
| Latvia | Jānis |
| Lithuania | Eivilitas, Eivilitė, Eiviltas, Eiviltė, Janina, Jonas |
| Norway | Hans, Johannes, Jon |
| Poland | Dan, Danisz, Danuta, Emilia, Jan |