| Isaak | - | Swiss Name | Isaako | - | West Indies Name |
| Isabeau | - | French Name | Isabel | - | Spanish Name |
| Isabela | - | United States Name | Isabela | - | Spanish Name |
| Isabell | - | Hebrew Name | Isabella | - | Hebrew Name |
| Isabelle | - | French Name | Isabelo | - | Philippines Name |
| Isac | - | Portuguese Name | Isad | - | Turkish Name |
| Isadora | - | United States Name | Isagani | - | Philippines Name |
| Isai | - | Hindu Name | Isai | - | Indian Name |
| Isaiah | - | English Name | Isaiamudhu | - | Hindu Name |
| Isaiarasi | - | Hindu Name | Isaiarasu | - | Indian Name |
| Isaias | - | Philippines Name | Isaias | - | Spanish Name |
| Isaias | - | United States Name | Isaïe | - | Cyprien Name |
| Isaikani | - | Hindu Name | Isaivalan | - | Indian Name |
| Isak | - | Norse Name |
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