| Name | Meaning | Gender | Origin |
|---|
| Jefferson | son of Jeffrey | Male | English |
| Jeffery | Peaceful. Variant of Geoffrey in use since medieval times.
| Male | |
| Jeffrey | pledge of peace | Male | Spelling |
| Jeffry | Peaceful. Variant Of Jeffrey. | Unisex | English |
| Jemima | dove | Female | Hebrew |
| Jing | Pure Epitomy | Unisex | Chinese |
| Joli | Cheerful; Pretty. | Unisex | English |
| Jonah | Dove. In the bible Jonah was on board a ship God caused to sink: sailors traditionally use the name Jonah to personify someone who brings bad luck.
| Male | Hebrew |
| Kala | time, black | Unisex | |
| Kapok | | Unisex | |
| Kasimir | Famous, Great Destroyer | Unisex | Slavic |
| Katherine | Pure. Used since third century A.D. Early Latin forms Katerina and Caterina became Katharine and Catherine. French Cateline and English Catlyn came into wider use during medieval period when variants multiplied.
| Female | Greek |
| Kazimir | To Destroy Peace | Unisex | Russian |
| Kazuo | Harmonious Man | Unisex | Japanese |
| Kenny | English, born of fire, handsome | Male | English |
| Kenya | Animal Horn | Female | Hebrew |
| Lana | Attractive | Female | English |
| Laqueta | The quiet one.
| Female | |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Lexi | Greek, feminine form of Alexander, defending men | Female | English |
| Liam | Form of William.
| Male | Irish |
| Livia | Olive Tree | Female | English |
| Luck | | Unisex | |
| Lulu | Pet form of the names Louise or Louella.
| Female | English |
| Luz | light | Female | Spanish |