| Name | Meaning | Gender | Origin |
|---|
| Iris | rainbow, a play of colours | Female | |
| Isidor | Gift Of Isis, Mythical Goddess Of Sky And Nature | Unisex | Russian |
| Isidoro | Gift Of Isis, Mythical Goddess Of Sky And Nature | Unisex | Italian |
| Jay | jaybird | Male | Latin |
| Jenna | white shadow, white wave | Female | English |
| Jennet | God is gracious | Female | Old |
| 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 |
| Jovi | after Jon Bon Jovi | Unisex | |
| Juno | queen of the heavens | Female | Latin |
| Jupiter | Zeus, Father | Male | Roman |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Keira | after the actress Keira Knightley | Female | Irish |
| Keiran | Little, Dark | Unisex | Celtic |
| Keri | Black, Dark | Unisex | English |
| Kerry | dark, dark-haired | Male | Irish |
| Kya | Diamond In The Sky | Unisex | African |
| Lani | sky, heaven | Unisex | |
| Leia | Weary | Unisex | Hebrew |
| Leilany | | Unisex | |
| Lilith | character in Cheers | Female | Assyrian |
| Mariposa | Spanish for butterfly | Female | Spanish |
| Mavis | a small bird | Female | |
| Mega | | Unisex | Hebrew |
| Merle | Bright Sea | Male | English |
| Minnesota | | Unisex | Hebrew |