Family name Piernas (Piernas 
) , across the world, is a rare last name. The surname Piernas is habitual in Spain, where it is a rare surname, France, and Argentina. Measured by absolute frequency, this name is the most popular in Spain, France, and the United States. Also, Piernas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piernas | Spain, Philippines, United States, Argentina, France |
| pedro piernas Spanish military colonial governor (b. 1750) |
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| carlos balenchaga y piernas (b. 1863) |
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| carlos jiménez piernas (b. 1952) |
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| sergio piernas Spanish association football manager, ES (b. 1976) |
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| juan piernas Investigador, ORCID 0000-0002-6040-5961 |
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