Around the world, Ildefonsa (Ildefonsa 
) is quite a rare girly given name. The forename Ildefonsa is characteristic of Mexico, where it is quite a rare girly name, Philippines, and Nicaragua, where it is a rare female name. Not in comparison with a country's population, it most frequently occurs in Mexico, Philippines, and Argentina. Likewise, Ildefonsa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ildefonsa | Peru, Philippines, Argentina, Spain, Mexico |
| ildefonsa múgica azcárate Spanish pianist and conductor, ES (b. 1888) |
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| ildefonsa tarrida sardà Spanish politician, ES (b. 1949) |
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| ildefonsa salgado santos político español |
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