| Horacio | | o-RAH-thyo (Spanish), o-RAH-syo (Latin American Spanish) | Spanish | |
| Hortensia | | - | Ancient Roman, Spanish | |
| Hugo | | OO-go (Spanish), HYOO-go (English), HUY-kho (Dutch), HOO-go (German) | Spanish, Portuguese, Catalan, English, Dutch, German, Swedish, Norwegian, Danish, Ancient Germanic ( | |
| Ida | | IE-də (English), EE-dah (German, Swedish, Danish, Dutch, Italian) | English, German, Swedish, Norwegian, Danish, Dutch, Italian, Spanish, Portuguese, Hungarian, Slovene | |
| Idoya | | ee-DHOI-ah | Spanish | |
| Ignacia | | eeg-NAH-thyah (Spanish), eeg-NAH-syah (Latin American Spanish) | Spanish | |
| Ignacio | | eeg-NAH-thyo (Spanish), eeg-NAH-syo (Latin American Spanish) | Spanish | |
| Ildefonso | | - | Spanish | |
| Ileana | | - | Romanian, Spanish, Italian | |
| Imelda | | ee-MEL-dah | Italian, Spanish | |
| InÉS | | ee-NES | Spanish | |
| Inma | | - | Spanish | |
| Inmaculada | | - | Spanish | |
| Inocencio | | ee-no-THEN-thyo (Spanish), ee-no-SEN-syo (Latin American Spanish) | Spanish | |
| Irene | | ie-REEN (English), ie-REE-nee (English), ee-RE-ne (Italian), EE-re-ne (Finnish), ee-RE-nu (German) | English, Italian, Spanish, Portuguese, Swedish, Norwegian, Danish, Finnish, German, Ancient Greek (L | |