| Name | Meaning | Gender | Origin |
|---|
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackson | Son of Jack | Male | English |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| Jay | jaybird | Male | Latin |
| Jemima | dove | Female | Hebrew |
| Jenna | white shadow, white wave | Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jessie | wealthy | Female | Anglicized |
| 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 |
| Kafka | jackdaw | Male | Czech |
| Kea | Latin, rejoice; variation of Gaius | Male | Cornish |
| Kiri | tree bark | Female | Maori |
| Koko | stork | Female | Japanese |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Lynette | idol | Female | Welsh |
| Mamo | Saffron Flower, Yellow Bird | Unisex | Hawaiian |
| Marlon | little hawk | Male | English |
| Martin | Warlike person. | Male | Latin |
| Mavis | a small bird | Female | |
| Melba | slender, soft; mallow flower | Female | Modern |
| Merle | Bright Sea | Male | English |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |