| Name | Meaning | Gender | Origin |
|---|
| Jasmine | Flower
| Female | Persian |
| Jean | God is gracious | Male | |
| Jeanette | French variation of Jean, God is gracious | Female | |
| Jessie | wealthy | Female | Anglicized |
| Jessy | God's Gracious Gift | Unisex | Hebrew |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Johnson | Son of John
| Male | English |
| Johnston | From John's farm
| Male | |
| Kade | From the wetlands.
| Male | Spelling |
| Kai | Fire
| Male | Hawaiian |
| Kalina | Flower
| Female | |
| Kam | Form of Cameron crooked nose.
| Male | |
| Kamden | Winding Valley. Form of Camden.
| Male | Spelling |
| Kameron | Scottish surname, crooked nose | Male | Spelling |
| Kayleigh | Slender | Unisex | English |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelly | Lively: aggressive.
| Female | Irish |
| Kennedy | misshapen head | Female | Irish |
| Kenny | English, born of fire, handsome | Male | English |
| Kinney | | Unisex | |
| Kinny | From The Top Of The Cliff | Unisex | Scottish |
| Kirk | church | Male | Norse |
| Kirstin | Variant of Kristen. Follower of Christ.
| Female | |
| Kylah | Feminine form of Kyle (Fair).
| Female | |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |