| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 1541 | Ilus | Latin | Founder of Troy. | M | |
| 1542 | Immaculata | Latin | The Immaculate Conception. | F | |
| 1543 | Imogen | Latin | Image. Blameless; innocent. | F | |
| 1544 | Imogene | Latin | Image. Blameless; innocent. | F | |
| 1545 | Imogenia | Latin | Image. Blameless; innocent. | F | |
| 1546 | Imperia | Latin | Commanding. | F | |
| 1547 | Inachus | Latin | Father of Io. | M | |
| 1548 | Inaki | Latin | Ardent. | M | |
| 1549 | Ince | Latin | Innocent. | M | |
| 1550 | Inek | Latin | Small. | M | |
| 1551 | Inferna | Latin | Proserpina's surname. | F | |
| 1552 | Iniga | Latin | Fiery. | F | |
| 1553 | Inigo | Latin | Fiery. St. Ignacius of Loyola was founder of the Catholic Jesuit order. | M | |
| 1554 | Innocent | Latin | Innocent. | M | |
| 1555 | Innocenty | Latin | Innocent. | M | |
| 1556 | Intercidona | Latin | Goddess of birthing. | F | |
| 1557 | Inuus | Latin | God of fertility. | M | |
| 1558 | Invidia | Latin | Envious. | F | |
| 1559 | Inyx | Latin | Spell. | F | |
| 1560 | Iphicles | Latin | Twin of Hercules. | M | |