| ANŽE m Slovene |
| BEVAN m Welsh |
| DESHAUN m African American |
| DESHAWN m African American |
| EAN m Manx |
| ELIÁN m Various |
| EOIN m Irish, Scottish |
| EVAN m Welsh, English |
| GANIX m Basque |
| GHJUVAN m Corsican |
| GIAMBATTISTA m Italian |
| GIAMPAOLO m Italian |
| GIAMPIERO m Italian |
| GIAN m Italian (Archaic) |
| GIANCARLO m Italian |
| GIANFRANCO m Italian |
| GIANLUCA m Italian |
| GIANLUIGI m Italian |
| GIANMARCO m Italian |
| GIANMARIA m Italian |
| GIANNI m Italian |
| GIANNINO m Italian |
| GIANPAOLO m Italian |
| GIANPIERO m Italian |
| GIOVANNI m Italian |
| GJON m Albanian |
| HAMPUS m Swedish |
| HANK m English |
| HANKE m German |
| HANKIN m Medieval English |
| HANN m Medieval English |
| HANNE (1) f & m Danish, Norwegian, German, Dutch |
| HANNES m Dutch, German, Finnish |
| HANNU m Finnish |
| HANS m German, Dutch, Swedish, Norwegian, Danish |
| HASSE m Swedish |
| HONZA m Czech |
| HOVHANNES m Armenian |
| IAIN m Scottish |
| IAN m Scottish, English |
| IANCU m Romanian |
| IANTO m Welsh |
| IEFAN m Welsh |
| IEUAN m Welsh |
| IFAN m Welsh |
| IOAN m Romanian, Welsh, Bulgarian |
| IOANN m Russian |
| IOANNES m Greek, Biblical Greek |
| IOANNIS m Greek |
| IOANNU m Old Church Slavic |
| IOHANNES m Biblical Latin |
| ION m Basque, Romanian |
| IONEL m Romanian |
| IONUȚ m Romanian |
| IVÁN m Spanish |
| IVAN m Russian, Bulgarian, Ukrainian, Serbian, Croatian, Czech, Slovene, Macedonian, English |
| IVICA m Croatian |
| IVO (2) m Bulgarian, Serbian, Croatian, Macedonian |
| IWAN m Welsh, Polish |
| JAAN m Estonian |
| JACK m English |
| JACKIE m & f English |
| JACKIN m Medieval English |
| JACKSON m English |
| JAKE m English |
| JÁN m Slovak |
| JAN (1) m Dutch, Swedish, Norwegian, Danish, Czech, Polish, Slovene, German |
| JAN (3) m Medieval English |
| JANCSI m Hungarian |
| JANEK m Polish, Czech |
| JANEZ m Slovene |
| JANI m Finnish, Hungarian |
| JANIKA m Hungarian |
| JĀNIS m Latvian |
| JANKIN m Medieval English |
| JANKO m Slovene, Croatian, Serbian, Slovak |
| JANNE (1) m Finnish, Swedish |
| JANNICK m Danish |
| JANNIK m Danish |
| JÁNOS m Hungarian |
| JANUSZ m Polish |
| JAXON m English (Modern) |
| JAXSON m English (Modern) |
| JEAN (1) m French |
| JEAN-BAPTISTE m French |
| JEAN-MARIE m French |
| JEANNOT m French |
| JEHAN m Medieval French |
| JENS m Danish, Swedish, Norwegian |
| JO f & m English, German, Dutch |
| JOAN (2) m Catalan, Occitan |
| JOANNES m Late Roman |
| JOÃO m Portuguese |
| JOÃOZINHO m Portuguese |
| JOĈJO m Esperanto |
| JOCK m Scottish |
| JOCKIE m Scottish |
| JOCKY m Scottish |
| JOEY m & f English |
| JOHAN m Swedish, Norwegian, Danish, German, Dutch, Czech |
| JÓHANN m Icelandic |
| JOHANN m German |
| JÓHANNES m Icelandic |
| JOHANNES m German, Dutch, Swedish, Norwegian, Danish, Finnish, Estonian, Late Roman |
| JOHANO m Esperanto |
| JOHNIE m & f English |
| JOHNNIE m & f English |
| JOHNNY m English |
| JOJO m & f English |
| JÓN m Icelandic |
| JON (1) m Swedish, Norwegian, Danish, Basque |
| JON (2) m English |
| JONAS (1) m Lithuanian |
| JONI (2) m Finnish |
| JOOP m Dutch |
| JOUNI m Finnish |
| JOVAN m Serbian, Macedonian |
| JOWAN m Cornish |
| JUAN m Spanish, Manx |
| JUANITO m Spanish |
| JUHA m Finnish |
| JUHAN m Estonian |
| JUHANA m Finnish |
| JUHANI m Finnish |
| JUHO m Finnish |
| JUKKA m Finnish |
| JUSSI m Finnish |
| KALOYAN m Bulgarian |
| KEONI m Hawaiian |
| KESHAUN m African American (Modern) |
| KESHAWN m African American (Modern) |
| LASHAWN f & m African American |
| MALONE m English (Rare) |
| NELU m Romanian |
| NINO (1) m Italian |
| OHANNES m Armenian |
| RASHAUN m African American (Rare) |
| RASHAWN m African American (Modern) |
| SEÁN m Irish |
| SEAN m Irish, English |
| SEOC m Scottish |
| SHANE m Irish, English |
| SHAUN m English |
| SHAWN m English |
| SHAYNE m English |
| SINJIN m English (Rare) |
| SIÔN m Welsh |
| SJANG m Limburgish |
| SJENG m Limburgish |
| VAN m English |
| VANJA m & f Croatian, Serbian, Swedish, Norwegian, Danish |
| VANNI m Italian |
| VANYA m Russian |
| XOÁN m Galician |
| XUAN m Spanish |
| YAHWEH m Theology |
| YAHYA m Arabic, Turkish |
| YAN m Bulgarian |
| YANCY m English |
| YANICK m & f Breton, French |
| YANKO m Bulgarian |
| YANN m Breton, French |
| YANNI m Greek |
| YANNIC m & f Breton, French |
| YANNICK m & f Breton, French |
| YANNIS m Greek |
| YEHOCHANAN m Biblical Hebrew |
| YIANNI m Greek |
| YIANNIS m Greek |
| YOAN m Bulgarian |
| YOCHANAN m Hebrew, Biblical Hebrew |
| ŽAN m Slovene |
| ZUAN m Medieval Italian |
