| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Herminius | - | Ancient Roman | ||
| Hilaria | ee-LAH-ryah (Spanish) | Ancient Roman, Spanish | ||
| Hilarius | - | Ancient Roman | ||
| Horatia | - | Ancient Roman | ||
| Horatius | - | Ancient Roman | ||
| Hortensia | - | Ancient Roman, Spanish | ||
| Hortensius | - | Ancient Roman | ||
| Ianuarius | - | Ancient Roman | ||
| Iovianus | - | Ancient Roman | ||
| Iovita | - | Ancient Roman | ||
| Iulia | YOO:-li-a (Ancient Roman) | Romanian, Ancient Roman | ||
| Iuliana | - | Romanian, Ancient Roman | ||
| Iulianus | - | Ancient Roman | ||
| Iulius | YOO:-li-uws | Ancient Roman | ||
| Iunia | - | Ancient Roman, Biblical Latin |