| Name | Meaning | Gender | Origin |
|---|
| Julianna | Down-bearded youth | Female | Latin |
| Julianne | Down-bearded youth | Female | Latin |
| Julie | Down-bearded youth | Female | Latin |
| Juliet | Down-bearded youth | Female | Latin |
| Juliette | Down-bearded youth | Female | Latin |
| June | The sixth month of the year | Female | English |
| Kaiyo | Generation child | Female | Japanese |
| Kameko | Tortoise child | Female | Japanese |
| Kapera | | Female | Hebrew |
| Kaya | Pure | Female | Greek |
| Kayla | Who is like God? | Female | Hebrew |
| Keiki | Child, offspring, descendant | Female | Hawaiian |
| Keiko | Blessed child | Female | Japanese |
| Kenda | Valley of the River Kent | Female | Gaelic |
| Keri | Country of the children of Ciar | Female | Gaelic |
| Kerri | Country of the children of Ciar | Female | Gaelic |
| Kerry | Country of the children of Ciar | Female | Gaelic |
| Kevina | Beautiful at birth | Female | Gaelic |
| Kioko | Joyful child | Female | Japanese |
| Kit | Bearer of Christ | Unisex | Greek |
| Koko | The second child | Female | African |
| Kris | Follower of Christ | Unisex | Latin |
| Kumiko | Child with braids | Female | Japanese |
| Kuniko | Child born in the country | Female | Japanese |
| Kyoko | Respectful child | Female | Japanese |
| Laila | Dark beauty | Female | Arabic |
| Lana | Rock | Female | Gaelic |
| Leia | Weary | Female | Hebrew |
| Lindsay | Uncertain, perhaps dark lake | Female | Gaelic |
| Lindsey | Lincoln island | Unisex | English |