| Name | Meaning | Gender | Origin |
|---|
| Ian | Form of John | Male | Scottish |
| Irving | handsome, fair | Male | Scottish |
| Ivor | yew | Male | Scottish |
| Jackie | supplanter | Female | English |
| Jacques | supplanter | Male | |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jamie | Feminine of James | Female | Scottish |
| Janet | Variant of Jane | Female | English |
| Jean | God is gracious | Male | |
| Jessie | wealthy | Female | Anglicized |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Kade | From the wetlands.
| Male | Spelling |
| Kameron | Scottish surname, crooked nose | Male | Spelling |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |
| Kenya | Animal Horn | Female | Hebrew |
| Kirsty | Anointed, Follower Of Christ | Unisex | Scottish |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Lamont | Man Of Law | Male | Scottish |
| Lass | Girl | Unisex | English |
| Lassie | Girl
| Female | |
| Lennox | amid the lems, from the field of elm trees | Male | Scottish |