| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2024 |
| Ira | Irene | Old Greek | Italian | the peaceful | |
| Irén | Irene | Old Greek | Hungarian | the peaceful | |
| Irena | Irene | Old Greek | Dutch, Czech, Polish | the peaceful | |
| Írena | Irene | Old Greek | Icelandic | the peaceful | |
| Irenäus | Irenäus | Old Greek | German | the peaceful | |
| Irene | Irene | Old Greek | German, Scandinavian, Italian, English | the peaceful | #637 |
| Irène | Irene | Old Greek | French | the peaceful | |
| Iria | Iris | Old Greek | Spanish | rainbow | |
| Iride | Iris | Old Greek | Italian | rainbow | |
| Irina | Irene | Old Greek | Russian | the peaceful | |
| Irini | Irene | Old Greek | Greek | the peaceful | |
| Iris | Iris | Old Greek | German, Scandinavian, Dutch, English | rainbow | #71 |
| Íris | Iris | Old Greek | Icelandic | rainbow | |
| Isadora | Isidore/Isidora | Old Greek | German, Portuguese, English | gift of Isis | |
| Isadore | Isidore/Isidora | Old Greek | German, English | gift of Isis | |
| Isidor | Isidore/Isidora | Old Greek | German | gift of Isis | |
| Isidora | Isidore/Isidora | Old Greek | German, Italian, English | gift of Isis | |
| Isidore | Isidore/Isidora | Old Greek | German | gift of Isis | |
| Isidore | Isidore/Isidora | Old Greek | French, English | gift of Isis | |
| Isidoro | Isidore/Isidora | Old Greek | Italian | gift of Isis | |
| Isidro | Isidore/Isidora | Old Greek | Spanish | gift of Isis | |
| Ismene | Ismene | Old Greek | German, English | | |
| Ismini | Ismene | Old Greek | Greek | | |
| István | Steven/Stephanie | Old Greek | Hungarian | the crowned | |
| Iti | Iti | Old Greek | Italian | | |
| Iuri | Georg/Georgia | Old Greek | Portuguese | farmer, earthworker | |
| Izydor | Isidore/Isidora | Old Greek | Polish | gift of Isis | |
| Jace | Jason | Old Greek | English | Words: heal | #114 |
| Jacenty | Hyacinth/Hyacinth | Old Greek | Polish | | |
| Jacinda | Hyacinth/Hyacinth | Old Greek | English | | |
| Jacinta | Hyacinth/Hyacinth | Old Greek | Portuguese, Spanish | | |
| Jacinto | Hyacinth/Hyacinth | Old Greek | Portuguese, Spanish | | |
| Jano | Alexander/Alexandra | Old Greek | German | he who wards off (other) men, defender of men | |
| Jase | Jason | Old Greek | English | Words: heal | #636 |
| Jason | Jason | Old Greek | English | Words: heal | #148 |
| Jayce | Jason | Old Greek | English | Words: heal | #169 |
| Jayceon | Jason | Old Greek | English | Words: heal | #621 |
| Jayse | Jason | Old Greek | English | Words: heal | |
| Jayson | Jason | Old Greek | English | Words: heal | #621 |
| Jekaterina | Katherine | Old Greek | Russian | maybe the pure | |
| Jela | Helen | Old Greek | Slavic | maybe the torch | |
| Jelena | Helen | Old Greek | Russian | maybe the torch | |
| Jelka | Helen | Old Greek | Hungarian | maybe the torch | |
| Jenesis | Genesis/Genesis | Old Greek | English | birth | #711 |
| Jenö | Eugen/Eugenie | Old Greek | Hungarian | well born, noble | |
| Jeroen | Hieronymus/Hieronyma | Old Greek | Dutch | sacred name | |
| Jerome | Hieronymus/Hieronyma | Old Greek | English | sacred name | |
| Jérôme | Hieronymus/Hieronyma | Old Greek | French | sacred name | |
| Jeron | Hieronymus/Hieronyma | Old Greek | English | sacred name | |
| Jerónimo | Hieronymus/Hieronyma | Old Greek | Spanish | sacred name | |
| Jerzy | Georg/Georgia | Old Greek | Polish | farmer, earthworker | |
| Jevdokija | Evdokia | Old Greek | Russian | pleasure, delight | |
| Jewgeni | Eugen/Eugenie | Old Greek | Russian | well born, noble | |
| Jirí | Georg/Georgia | Old Greek | Czech | farmer, earthworker | |
| Jirina | Georg/Georgia | Old Greek | Czech | farmer, earthworker | |
| Jolanda | Yolanda | Old Greek | Italian | violet | |
| Jolanta | Yolanda | Old Greek | Polish | violet | |
| Jolantha | Yolanda | Old Greek | German | violet | |
| Jolanthe | Yolanda | Old Greek | German | violet | |
| Jole | Yolanda | Old Greek | Italian | violet | |
| Jorck | Georg/Georgia | Old Greek | Scandinavian | farmer, earthworker | |
| Jordi | Georg/Georgia | Old Greek | Catalan | farmer, earthworker | |
| Jordy | Georg/Georgia | Old Greek | Dutch | farmer, earthworker | |
| Jörg | Georg/Georgia | Old Greek | German | farmer, earthworker | |
| Jorge | Georg/Georgia | Old Greek | Spanish | farmer, earthworker | #285 |
| Jörgen | Georg/Georgia | Old Greek | German, Scandinavian | farmer, earthworker | |
| Jørgen | Georg/Georgia | Old Greek | Scandinavian | farmer, earthworker | |
| Jorgie | Georg/Georgia | Old Greek | English | farmer, earthworker | |
| Jorina | Gregory/Gregoria | Old Greek | Frisian | the watchful | |
| Jorinde | Gregory/Gregoria | Old Greek | German, Low German | the watchful | |
| Joris | Georg/Georgia | Old Greek | German, Dutch, Low German | farmer, earthworker | |
| Joris | Gregory/Gregoria | Old Greek | German, Dutch, Low German | the watchful | |
| Jorja | Georg/Georgia | Old Greek | English | farmer, earthworker | |
| Jörn | Georg/Georgia | Old Greek | German, Low German | farmer, earthworker | |
| Jörna | Georg/Georgia | Old Greek | German | farmer, earthworker | |
| Jörne | Georg/Georgia | Old Greek | German | farmer, earthworker | |
| Jrue | Andrew/Andrea | Old Greek | English | the manly, the brave | #892 |
| Jure | Georg/Georgia | Old Greek | Slovenian | farmer, earthworker | |
| Jürg | Georg/Georgia | Old Greek | German | farmer, earthworker | |
| Jürgen | Georg/Georgia | Old Greek | German | farmer, earthworker | |
| Juri | Georg/Georgia | Old Greek | Russian | farmer, earthworker | |
| Jurij | Georg/Georgia | Old Greek | Slavic | farmer, earthworker | |
| Jurka | Georg/Georgia | Old Greek | Polish | farmer, earthworker | |
| Kaarina | Katherine | Old Greek | Finnish | maybe the pure | |
| Kaat | Katherine | Old Greek | Dutch | maybe the pure | |
| Kaia | Karin | Old Greek | Scandinavian | maybe the pure | #180 |
| Kaitlin | Katherine | Old Greek | English | maybe the pure | |
| Kaitlyn | Katherine | Old Greek | English | maybe the pure | #649 |
| Kaitlynn | Katherine | Old Greek | English | maybe the pure | |
| Kajsa | Karin | Old Greek | Scandinavian | maybe the pure | |
| Kalixtus | Callisto/Callista | Old Greek | German | most beautiful | |
| Kalliope | Kalliope | Old Greek | German, English | beautiful voice | |
| Kallistus | Callisto/Callista | Old Greek | German | most beautiful | |
| Karen | Karin | Old Greek | German, Scandinavian | maybe the pure | |
| Kari | Katherine | Old Greek | English | maybe the pure | |
| Karin | Karin | Old Greek | German, Scandinavian, Finnish | maybe the pure | |
| Karina | Karin | Old Greek | German, Scandinavian | maybe the pure | #774 |
| Karine | Karin | Old Greek | French | maybe the pure | |
| Kasandra | Cassandra | Old Greek | English | Words: protrude / man | |
| Kassandra | Cassandra | Old Greek | German | Words: protrude / man | |