| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 621 | Imanol | Hebrew | God is with us. | M | |
| 622 | Immanuel | Hebrew | Variant of Emanuel: God is with us; god is among us. | M | |
| 623 | Ioan | Hebrew | Gift from God. | M | |
| 624 | Ionnes | Hebrew | Gift from God. | M | |
| 625 | Iosep | Hebrew | God will multiply. | M | |
| 626 | Ioseph | Hebrew | God will multiply. | M | |
| 627 | Iov | Hebrew | God will estahlish. | M | |
| 628 | Ira | Hebrew | Watchful. One of King David's men in the Old Testament. Famous Bearer: Lyricist Ira Gershwin. | M | |
| 629 | Isaac | Hebrew | He laughs. Laughter. The only son born to Abraham and his wife Sarah (in the Old Testament). Famous Bearers: British scientist Sir Isaac Newton (1642-1727) and the great violinist Itzhak Perlman. | M | |
| 630 | Isaakios | Hebrew | Child of laughter. | M | |
| 631 | Isaiah | Hebrew | The Lord is generous. Salvation of the Lord. God's helper. | M | |
| 632 | Isaias | Hebrew | God's helper. | M | |
| 633 | Iseabail | Hebrew | Devoted to God. | M | |
| 634 | Ishmael | Hebrew | God listens. In the bible Ismael was son of Abraham by Sarah's Egyptian slave woman Hagar. | M | |
| 635 | Isiah | Hebrew | God's helper. | M | |
| 636 | Ismael | Hebrew | God listens. In the bible Ismael was son of Abraham by Sarah's Egyptian slave woman Hagar. | M | |
| 637 | Israel | Hebrew | May God prevail. He struggles with God. God perseveres; contends. In the bible when Jacob was in his nineties as a token of blessing God changed his name to Israel. | M | |
| 638 | Isreal | Hebrew | Ruling with the Lord. | M | |
| 639 | Itai | Hebrew | Friendly. | M | |
| 640 | Ittamar | Hebrew | Island of palms. | M | |