| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 1521 | Hyria | Latin | Daughter of Amphinomus. | F | |
| 1522 | Iaera | Latin | A nymph. | F | |
| 1523 | Ibolya | Latin | Flower. | F | |
| 1524 | Ida | Latin | A nymph. | F | |
| 1525 | Idomeneus | Latin | King of Crete. | M | |
| 1526 | Idonea | Latin | Suitable. | F | |
| 1527 | Ierna | Latin | From Ireland. | F | |
| 1528 | Ierne | Latin | From Ireland. | F | |
| 1529 | Igantia | Latin | Fiery. | F | |
| 1530 | Ignac | Latin | Ardent. | M | |
| 1531 | Ignacia | Latin | Fiery. | F | |
| 1532 | Ignacio | Latin | Fiery. St. Ignacius of Loyola was founder of the Catholic Jesuit order. | M | |
| 1533 | Ignatius | Latin | Ardent. | M | |
| 1534 | Ilari | Latin | Cheerful. | M | |
| 1535 | Ilarion | Latin | Cheerful. | M | |
| 1536 | Ilia | Latin | Mother of Remus and Romulus. | F | |
| 1537 | Iliona | Latin | Daughter of Riam. | F | |
| 1538 | Illan | Latin | Youth. | M | |
| 1539 | Illian | Latin | Youth. | M | |
| 1540 | Illius | Latin | Youth. | M | |