| Name | Meaning | Gender | Origin |
|---|
| Josephine | God will increase | Female | |
| Josie | From Josephine - She shall add. | Female | English |
| Judy | Hebrew, He will be praised, woman from Judea | Female | English |
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| Juliet | youthful | Female | English |
| Juniper | Juniper Tree | Female | English |
| Justin | just, true | Male | Latin |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kate | Pure | Female | English |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |
| Kerry | dark, dark-haired | Male | Irish |
| Kirsty | Anointed, Follower Of Christ | Unisex | Scottish |
| Lilly | Lily | Female | English |
| Lisa | Devoted to God
| Female | English |
| Liza | Diminutive of Elizabeth, Hebrew, pledged to God | Female | English |
| Lizzie | From Elizabeth - Consecrated to God | Female | English |
| Logan | little hollow | Male | Scottish |
| Lois | Battle Maiden | Female | Greek |
| Loki | To Break | Male | Norse |
| Lola | strong woman | Female | Spanish |
| Louis | famed warrior | Male | |
| Louise | Renowned fighter. Feminine of Louis.
| Female | |
| Ludwig | Famous fighter
| Male | |
| Luigi | Famous fighter
| Male | Italian |
| Luis | Famous fighter
| Male | |