| Issar | Meaning a rich person. |
| Istakhar | Istakhar means 'exalted' or 'high' in Arabic, often used as a given name or title. |
| Istakhri | A shafaee jurist, Abu Saeed |
| Istuti | Praises; Prayer |
| Isu | God Contends; Quivering; An Arrow; The Number |
| Isupa | A name meaning a joyful spirit. |
| Itala | A name meaning a mountain peak. |
| Italy | Abounding with calves or heifers. |
| Ithiel | Sign; or coming of God |
| Itisa | A name meaning the beginning. |
| Itsaso | Basque word meaning the ocean. |
| Iturea | Guarded, mountainous. |
| Iulus | Latin name meaning downybearded youth. |
| Ivanjali | A divine gift or offering. |
| Ivanna | God is gracious and kind. |
| Ivar | A warrior with a yew bow. |
| Ivon | A variant of the name for yew. |
| Ixaka | Child of laughter |
| IXION | myth name (father of the centaurs) JACINTO |
| Iyanuoluwa | A miracle from the Almighty. |
| Izabel | Variant of Elizabeth. My God is bountiful;God of plenty. |
| Izazuddawlah | Honor of the state |
| Izreal | Ruling with the Lord |
| Izumi | A Japanese name meaning fountain or spring. |
| Jaabili | A name meaning one who is like the moon. |
| Jaagritha | A name meaning one who is alert today. |
| Jaanai | Answering, afflicting, making poor. |
| Jaanya | Life, Born, Lovable, Father, Friend |
| Jaasritha | Name of Goddess Lakshmi |
| Jaathavedhas | A name referring to Lord Agni. |
| Jaaziel | The strength of the Lord |
| Jaban | Soft hearted, Tenderness of |
| Jabarl | A strong, powerful leader. |
| Jabeen | Refers to a noble forehead. |
| Jabin | God has built. A Biblical name. |
| Jabneh | He that understands; building |
| Jabril | Arabic form of gabriel, An Angel |
| Jace | A healer or a sharp mind. |
| Jacelyn | Based on the initials J.C. or an abbreviation of Jacinda. |
| Jacobe | Variant of the name Jacob |