| Name | Meaning | Gender | Origin |
|---|
| Joe | Abbreviation of Joseph.
| Male | English |
| John | God is merciful | Male | Hebrew |
| Jon | God is gracious; or gift of Jehovah | Male | English |
| Josh | God Saves | Unisex | English |
| Judd | praised | Male | Medieval |
| Judge | One who hears and decides Court cases. | Male | Word |
| Juice | | Unisex | Hebrew |
| Jules | youthful; soft, downy | Male | |
| Kai | Fire
| Male | Hawaiian |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kayle | | Unisex | Hebrew |
| Keene | Ancient.
| Male | |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Ken | Male Barbie Doll. | Male | English |
| Kes | | Unisex | Hebrew |
| Khan | An Indian ruler or official | Unisex | |
| Kid | | Unisex | Hebrew |
| Kim | chief | Male | English |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Kip | From The Pointed Hill | Unisex | English |
| Kirk | church | Male | Norse |
| Kiss | | Unisex | Hebrew |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Kitt | | Male | |
| Klaus | Scandinavian and German variation of Nicolas | Male | |