| Name | Meaning | Gender | Origin |
|---|
| Joel | God is willing, Jehova is the Lord | Male | Hebrew |
| John | God is merciful | Male | Hebrew |
| 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 |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Jonathan | God gives | Male | Hebrew |
| Jonathon | gift of Jehovah | Male | Spelling |
| Jordan | The descending river, to flow | Male | Hebrew |
| Jordy | Flow, Descend | Unisex | English |
| Jore | God will uplift
| Male | |
| Jori | Descending
| Male | |
| Jorim | Jehovah is exalted. An ancestor of Mary.
| Male | |
| Jory | God will uplift
| Male | English |
| Jose | Jehovah increases | Male | Spanish |
| Josee | God Will Increase | Unisex | French |
| Joseph | God will increase | Male | Hebrew |
| Josephina | God Will Increase | Unisex | Latin |
| Josh | God Saves | Unisex | English |
| Joshua | God is salvation
| Male | Hebrew |
| Judas | praised | Male | Greek |
| Judd | praised | Male | Medieval |
| Klara | Clear, Bright | Unisex | Scandinavian |
| Kush | son of Rama | Unisex | |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Lace | From Lassy, Normandy | Unisex | English |