| Name | Meaning | Gender | Origin |
|---|
| Iliana | from Ilium or Troy | Female | Greek |
| Ingrid | Ing's ride | Female | Norse |
| Irene | Peace
| Female | Greek |
| Irina | peace | Female | Russian |
| Irma | universal, complete | Female | |
| Isabel | concecrated to God | Female | Spanish |
| Isabella | pledged to God | Female | Spanish |
| Isadora | gift of the moon | Female | Greek |
| Isolde | beautiful | Female | Welsh |
| Jadzia | Princess | Unisex | Polish |
| Jane | gracious, merciful, God is gracious | Female | English |
| Jasmine | Flower
| Female | Persian |
| Jezebel | follower of idols | Female | Hebrew |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| Josephine | God will increase | Female | |
| Julia | Youthful
| Female | Latin |
| Juliet | youthful | Female | English |
| Kate | Pure | Female | English |
| Katelyn | pure | Female | Spelling |
| Kayla | crown of laurels | Female | Arabic |
| Kelly | Lively: aggressive.
| Female | Irish |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Kerry | dark, dark-haired | Male | Irish |
| Kimberly | Cyneburga's Royal Forest, Meadow | Female | English |
| Krystal | Crystal, Ice | Unisex | Greek |