Surname Ildefonse (Ildefonse 
) , in the world, is a very rare cognomen. The surname Ildefonse is characteristic of Western Europe, particularly France, where it is a rare surname. Likewise, Ildefonse is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ildefonse | France, Democratic Republic of the Congo, United States |
| benoit ildefonse researcher (b. 1962) |
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| dean ildefonse |
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| frédérique ildefonse |
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