Throughout the world, Ildefons (Ildefons 
) is a rare male forename. The given name Ildefons is characteristic of Germany, where it is a very rare male name, and Spain. Likewise, Ildefons is the last name as well as the forename.
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| Ildefons | Germany, Spain, Andorra, Philippines, Poland |
| ildefons schnepf AT (b. 1649) |
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| ildefons straumeyer (1701-1743), CH (b. 1701) |
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ildefons von arx Swiss librarian and regional historian (1755-1833), CH (b. 1755) |
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| ildefons haas German composer (1735-1791), DE (b. 1735) |
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| ildefons johannes abraham lidl (b. 1736) |
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| ildefons troxler CH (b. 1741) |
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ildefons cerdà Urban planner (1815-1876), noted for the extension plan of Barcelona, ES (b. 1815) |
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| ildefons herderer DE (b. 1764) |
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ildefons milewicz January Uprising participant (b. 1835) |
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ildefons schober German priest, DE (b. 1849) |
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| ildefons krysiński PL (b. 1795) |
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ildefons sunyol Spanish politician, ES (b. 1866) |
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| ildefons par i pérez Spanish jurist and politician (1826-1894), ES (b. 1826) |
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| ildefons chełkowski PL (b. 1833) |
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ildefons houwalt Polish painter (1910-1987), PL (b. 1910) |
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