| Hope | Hope
| Female | |
| Irene | Peace
| Female | Greek |
| Iris | rainbow, a play of colours | Female | |
| Isis | throne | Female | Egyptian |
| Ivy | ivy plant, a wine | Female | Plant |
| Jane | gracious, merciful, God is gracious | Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Josephine | God will increase | Female | |
| Judy | Hebrew, He will be praised, woman from Judea | Female | English |
| Juice | | Unisex | Hebrew |
| Julia | Youthful
| Female | Latin |
| Karen | pure | Female | Danish |
| Kat | pure | Female | English |
| Kathleen | Innocent
| Female | Anglicized |
| Kristy | Anointed, Follower Of Christ | Female | English |
| Laura | bay laurel | Female | Latin |
| Layla | night | Female | Arabic |
| Layla | night | Female | Arabic |
| Leah | cow, weary one; glad tidings; mistress, ruler | Female | Hebrew |
| Lemmy | after Lemmy Kilmister of Motorhead | Unisex | |
| Lily | Lily
| Female | English |
| Lisa | Devoted to God
| Female | English |
| Lita | Light | Female | Latin |
| Liz | Hebrew, pledged to God | Female | English |