| Name | Meaning | Gender | Origin |
|---|
| Horace | timekeeper | Male | Latin |
| Howard | guardian of the home, watchman | Male | |
| Howie | Brave Heart, Mind | Unisex | English |
| Hubert | bright, shining intellect | Male | |
| Hugh | bright in mind and spirit | Male | English |
| Ian | Form of John | Male | Scottish |
| Ida | prosperous | Female | |
| Inez | pure, virginal | Female | Portuguese |
| Ira | watchful, descendant | Male | Hebrew |
| Irene | Peace
| Female | Greek |
| Irma | universal, complete | Female | |
| Irving | handsome, fair | Male | Scottish |
| Isaac | laughing one | Male | Hebrew |
| Isabel | concecrated to God | Female | Spanish |
| Isabelle | pledged to God | Female | |
| Ivan | Form of John | Male | Russian |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackie | supplanter | Female | English |
| Jacob | The supplanter, held by the heel | Male | Hebrew |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jane | gracious, merciful, God is gracious | Female | English |
| Janet | Variant of Jane | Female | English |
| Janie | Jehovah Has Been Gracious; Has Shown Favor. Variant Of Joan. | Unisex | English |