| Name | Meaning | Gender | Origin |
| Ilepsie | Diminutive of Hephzibah. My delight. | F | Hebrew |
| Ilham | Intuition. Inspiration. | F | Muslim |
| Ilia | God is Lord. | F | Hebrew |
| Iliana | Bright | F | Greek |
| Ilias | Jehovah is God. | M | Hebrew |
| Iliona | From Troy. | F | Greek |
| Ilithya | Goddess of Women in Labor | F | Greek |
| Ilka | Light. | F | Greek |
| Illan | youth | M | Basque/ Latin |
| Illanipi | Amazing. | M | Native American |
| Illian | Youth. | M | Latin |
| Illias | Jehovah is my God | M | Greek |
| Illius | Youth. | M | Latin |
| Illugi | Son of Aslak. | M | Norse |
| Illyria | Twelfth Night'/ also called 'What You Will' Orsino/ Duke of Illyria. | M | Shakespearean |
| Ilma | Resolute protector. Strong helmet. Diminutive of Wilhelmina/ feminine form of Wilhelm. | F | German |
| Ilo | Light/ Joyous/ Sunshine | M | African |
| Ilom | My Enemies Are Many | M | African |
| Ilon | Light. | F | Greek |
| Ilona | Beautiful/ sunshine | F | Hungarian |
| Ilonka | Light. | F | Greek |
| Ilori | Special Treasure | F | African |
| Ilsa | Abbreviation of Elizabeth. | F | German |
| Ilse | Consecrated to God | F | German |
| Ilu | Light. | F | Greek |
| Iluminada | Illuminated. | F | Spanish |
| Ilus | Founder of Troy. | M | Latin |
| Iluska | Light. | F | Greek |
| Ilya | From Elijah | M | Russian |
| Ilyaas | Variant of Ilyas: The Biblical Elijah is the English language equivalent. | M | Muslim |
| Ilyas | The Biblical Elijah is the English language equivalent. | M | Muslim |
| Ilyse | Noble. | F | German |
| Ilyssa | Rational | F | Hebrew |
| Im | A mythical giant. | M | Norse |
| Ima | presently | F | Japanese |
| Imaad | Variant of Imad: Support. Pillar. Confidence. | M | Muslim |
| Imaadudin | Variant of Imadudeen: The pillar of the Faith. | M | Muslim |
| Imaam | Variant of Imam: Leader. Chief. | M | Muslim |
| Imaan | Variant of Iman: Faith. Belief. | F | Muslim |
| Imad | Support. Pillar. Confidence. | M | Muslim |
| Imadudeen | The pillar of the Faith. | M | Muslim |
| Imadudin | Variant of Imadudeen: The pillar of the Faith. | M | Muslim |
| Imala | Disciplinarian | F | Native American |
| Imam | Leader. Chief. | M | Muslim |
| Iman | Faith | F | African |
| Imani | believer | F | Arabic |
| Imanol | God is with us. | M | Hebrew |
| Imaran | Strong | M | Hindi |
| Imelda | warrior | F | German |
| Imlah | Plentitude; circumcision | M | Biblical |