| Inge | | ING-e (Danish, Norwegian, Swedish), ING-gə (German), ING-ə (Dutch) | Danish, Norwegian, Swedish, German, Dutch | |
| Irena | | ee-RE-nah (Polish), ee-RAY-nah (Dutch) | Polish, Czech, Slovene, Croatian, Serbian, Dutch, Lithuanian | |
| Iris | | IE-ris (English), EE-ris (German, Dutch), EE-rees (Finnish, Spanish) | Greek Mythology, English, German, Dutch, Swedish, Norwegian, Danish, Finnish, French, Spanish | |
| Irma | | EER-mah (German, Finnish), UR-mə (English) | German, English, Dutch, Finnish, Spanish, Italian, Georgian, Lithuanian, Hungarian (Rare), Ancient G | |
| Isa (2) | | EE-sah: (Dutch) | German, Dutch, Italian, Spanish | |
| Isabella | | ee-zah-BEL-lah (Italian), iz-ə-BEL-ə (English) | Italian, German, English, Swedish, Norwegian, Danish, Dutch, Romanian | |
| Isabelle | | ee-za-BEL (French), IZ-ə-bel (English), ee-sah-BEL-lə (Dutch) | French, English, German, Dutch | |
| Ivo (1) | | EE-vo (German, Dutch, Italian), EE-fo (German), EE-voo (Portuguese) | German, Dutch, Italian, Portuguese, Czech, Ancient Germanic | |
| Ivonne | | ee-VAWN (German) | Spanish, German, Dutch | |
| IzaÄK | | - | Dutch | |
| Jaap | | YAH:P | Dutch | |
| Jacintha | | yah-SIN-tah | Dutch (Rare) | |
| Jacob | | JAY-kəb (English), YAH-kawp (Dutch) | English, Dutch, Swedish, Norwegian, Danish, Jewish, Biblical | |
| Jacoba | | yah-KO-bah | Dutch | |
| Jacobina | | yah-ko-BEE-nah | Dutch | |