| SAME ORIGIN |
| ARMENIAN: Hovanesian |
| BULGARIAN: Ivanov |
| CROATIAN: Ivanović |
| CZECH: Janiček |
| DANISH: Johannessen, Johansen, Johnsen |
| DUTCH: Jans, Jansen, Jansens, Jansing, Jansingh, Jansink, Janson, Janssen, Janssens, Janzen, Yancy |
| ENGLISH: Evanson, Hanson, Janson, Johns, Johnson, Jones |
| GERMAN: Jans, Janson, Janz |
| GREEK: Giannopoulos, Ioannidis |
| ICELANDIC: Jóhannsson |
| IRISH: Mallon, Malone, Mollown, Ó Maoil Eoin |
| LATVIAN: Jansons |
| LITHUANIAN: Jonaitis |
| MACEDONIAN: Ivanov, Ivanovski |
| NORWEGIAN: Jansen, Johannessen, Johansen, Johnsen |
| ROMANIAN: Ionesco, Ionescu |
| RUSSIAN: Ivanov |
| SERBIAN: Ivanović, Jovanović |
| SWEDISH: Janson, Jansson, Johansson, Johnsson |
| UKRAINIAN: Ivanov |
| WELSH: Bevan, Evans, Jones |
|
| DIMINUTIVES AND SHORT FORMS |
| BULGARIAN: Ivankov, Vanchev, Vanev, Vankov, Vantchev, Yanev, Yankov |
| CROATIAN: Janković |
| DANISH: Hansen |
| ENGLISH: Hancock, Jack, Jackson |
| GERMAN: Gensch |
| ITALIAN: Giannino, Nana, Nani, Nanni, Nannini, Zanetti, Zunino |
| SCOTTISH: Jack |
| SERBIAN: Janković |
| SLOVAK: Jankovic |
| SLOVENE: Jankovič |
| SWEDISH: Hansson |
|
| OTHER FORMS |
| IRISH: Mac Giolla Eoin, MacLean, McLain, McLean, Monday |
| SCOTTISH: Mac Gilleain, MacLean, McLain, McLean |
|
