| Name | Meaning | Gender | Origin |
|---|
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kohana | little flower | Unisex | |
| Ladybug | | Female | Hebrew |
| Lamaline | small village in Newfoundland | Unisex | |
| Lassie | Girl
| Female | |
| Lego | | Unisex | |
| Lemon | | Unisex | Hebrew |
| Leslie | dweller in the gray castle; small meadow | Female | Scottish |
| Lil | English from Latin, lily, a flower | Female | English |
| Lil | English from Latin, lily, a flower | Female | English |
| Lily | Lily
| Female | English |
| Little Guy | | Unisex | Hebrew |
| Little One | | Unisex | Hebrew |
| Lollipop | | Unisex | |
| Loretta | Pure
| Female | English |
| Lucita | Little light
| Female | |
| Lulu | Pet form of the names Louise or Louella.
| Female | English |
| Maleah | Bitter | Unisex | American |
| Mandarin | A high official of Imperial China. Also a small orange or tangerine like fruit. | Female | |
| Mansfield | From The Field By The Small River | Unisex | English |
| Manya | Bitter
| Female | |
| Marshmallow | A soft spongy sweet confectionery. Also a timid person. | Unisex | |
| Mavis | a small bird | Female | |
| Microbe | | Unisex | |
| Midge | Gnat like flies found near swamps. A little person | Female | English |