| Name | Meaning | Gender | Origin |
|---|
| Jeremiah | Exalted of the Lord
| Male | Hebrew |
| Jessica | God's grace | Female | Hebrew |
| Jingle | | Unisex | Hebrew |
| Jingles | | Unisex | Hebrew |
| Joanna | after the character in The Rescuers Down Under cartoon | Female | English |
| John | God is merciful | Male | Hebrew |
| Jolly | Full of good humor and high spirits. | Unisex | |
| Jon | God is gracious; or gift of Jehovah | Male | English |
| 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 |
| Joseph | God will increase | Male | Hebrew |
| Josephine | God will increase | Female | |
| Joshua | God is salvation
| Male | Hebrew |
| Joy | From Joyce - Gay and joyful | Female | Word |
| Judas | praised | Male | Greek |
| Juniper | Juniper Tree | Female | English |
| Karen | pure | Female | Danish |
| Kevin | handsome | Male | Irish |
| Killer | | Unisex | |
| Klaus | Scandinavian and German variation of Nicolas | Male | |
| Kringle | | Unisex | |
| Kristopher | Greek and Latin, bearer of Christ | Male | Greek |
| Leah | cow, weary one; glad tidings; mistress, ruler | Female | Hebrew |
| Lenora | Italian diminutive of Eleonora or Eleanor, meaning unknown | Female | English |
| Lips | | Unisex | |
| Love | loved one | Female | Word |