In the entire world, Isaïa (Isaïa 
) is a rare boy's given name. The given name Isaïa is habitual in Sub-Saharan Africa, particularly Madagascar, where it is a rare masculine name. Much less frequently, Isaïa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Isaïa | Madagascar, France |
| paulette isaïa French Resistance woman fighter, FR (b. 1911) |
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| isaïa gazzola |
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