| FULL FORMS |
| DUTCH: Jacoba, Jacobina, Jacobine, Jacomina, Wilhelmina, Willemijn, Willemina |
| ENGLISH: Wilhelmina |
|
| EQUIVALENTS |
| BULGARIAN: Zhaklina |
| CROATIAN: Vilma, Žaklina |
| CZECH: Vilma |
| DANISH: Bine, Jacobine |
| DUTCH: Coba, Elma, Helma, Mien, Mina, Wil, Willy, Wilma |
| ENGLISH: Mina, Minnie, Velma, Willa, Wilma |
| FINNISH: Helmi, Iina, Miina, Mimmi, Minna, Vilhelmiina, Vilma |
| FRENCH: Jacqueline, Jacquette |
| GERMAN: Elma, Helma, Helmine, Minna, Vilma, Wilhelmina, Wilhelmine, Wilma |
| HUNGARIAN: Vilma |
| ITALIAN: Giacoma, Giacomina |
| LIMBURGISH: Mien, Mina |
| LITHUANIAN: Vilhelmina |
| MACEDONIAN: Zhaklina |
| NORWEGIAN: Jacobine |
| POLISH: Wilhelmina, Żaklina |
| PORTUGUESE (BRAZILIAN): Jaqueline |
| SCOTTISH: Jamesina |
| SERBIAN: Žaklina |
| SLOVAK: Vilma |
| SPANISH: Vilma |
| SWEDISH: Helmi, Mimmi, Minna, Vilhelmina, Vilma |
|
| MASCULINE FORMS |
| ANCIENT GERMANIC: Wilhelm, Willahelm |
| ARABIC: Yakub, Yaqoob, Yaqub |
| ARMENIAN: Hagop, Hakob |
| BASQUE: Jakes |
| BIBLICAL GREEK: Iakobos |
| BIBLICAL HEBREW: Yaakov |
| BIBLICAL LATIN: Iacobus |
| BIBLICAL: Jacob, James |
| BRETON: Gwilherm |
| BULGARIAN: Yakov |
| CATALAN: Guillem, Jaume, Jaumet |
| CORNISH: Jago |
| CROATIAN: Jakov, Jakša, Vilim, Vilko |
| CZECH: Jakub, Vilém |
| DANISH: Ib, Jacob, Jakob, Jeppe, Vilhelm |
| DUTCH: Cobus, Coos, Jaap, Jacob, Jacobus, Jakob, Jelle, Kobe, Kobus, Koos, Pim, Sjaak, Sjakie, Wil, Wilhelmus, Willem, Willy, Wim |
| ENGLISH: Bill, Billie, Billy, Coby, Jacob, Jae, Jake, James, Jamey, Jay, Jaycob, Jaymes, Jeb, Jem, Jemmy, Jim, Jimi, Jimmie, Jimmy, Koby, Liam, Wil, Will, William, Willie, Willy |
| ESPERANTO: Vilĉjo, Vilhelmo |
| ESTONIAN: Jaagup, Jaak, Jaakob, Villem |
| FAROESE: Jákup |
| FINNISH: Jaakko, Jaakob, Jaakoppi, Jami, Jaska, Vilhelm, Vilhelmi, Vilho, Vili, Viljami, Viljo, Ville |
| FLEMISH: Jaak |
| FRENCH: Guillaume, Jacky, Jacques |
| FRISIAN: Japik |
| GALICIAN: Iago |
| GEORGIAN: Iakob, Koba |
| GERMAN: Jakob, Jockel, Wilhelm, Willi, Willy, Wim |
| HAWAIIAN: Iakopa, Kimo |
| HEBREW: Akiba, Akiva, Yaakov, Yakov |
| HUNGARIAN: Jakab, Jákob, Vilhelm, Vili, Vilmos |
| ICELANDIC: Jakob, Vilhjálmur |
| IRISH: Liam, Séamas, Séamus, Shamus, Sheamus, Uilleag, Uilliam, Ulick |
| ITALIAN: Giacobbe, Giacomo, Guglielmo, Iacopo, Jacopo, Lapo |
| JEWISH: Jacob |
| LATE ROMAN: Iacomus, Jacobus |
| LATVIAN: Vilhelms, Vilis |
| LIMBURGISH: Wöllem, Wullem, Wum |
| LITHUANIAN: Jokūbas, Vilhelmas |
| MACEDONIAN: Jakov |
| MANX: Illiam |
| MAORI: Hemi, Wiremu |
| MEDIEVAL ENGLISH: Wilkin, Wilky, Wilmot |
| NORWEGIAN: Jacob, Jakob, Vilhelm |
| OLD CHURCH SLAVIC: Iakovu |
| POLISH: Jakub, Kuba, Wilhelm |
| PORTUGUESE: Guilherme, Iago, Jacó, Jaime |
| RUSSIAN: Yakov, Yasha |
| SCOTTISH: Jamie, Seumas, Uilleam |
| SERBIAN: Jakov |
| SLOVAK: Jakub, Viliam |
| SLOVENE: Jaka, Jakob, Jaša, Vili, Viljem, Vilko |
| SPANISH: Guillermo, Jacobo, Jaime, Yago |
| SWEDISH: Jacob, Jakob, Vilhelm, Ville |
| TURKISH: Yakup |
| UKRAINIAN: Yakiv |
| WELSH: Gwil, Gwilim, Gwillym, Gwilym, Iago |
| YIDDISH: Kapel, Koppel, Yankel |
|
| OTHER FORMS |
| BASQUE: Xanti |
| CATALAN: Dídac |
| ENGLISH: Jameson, Jamison, Liam, Wilkie, Willis, Wilson |
| MEDIEVAL SPANISH: Didacus |
| PORTUGUESE (BRAZILIAN): Thiago |
| PORTUGUESE: Diogo, Santiago, Tiago |
| SCOTTISH: Hamish |
| SPANISH: Diego, Santiago |
|