Worldwide, Piaras (Piaras 
) is a very rare male first name. The first name Piaras is habitual in Northern Europe, particularly Ireland, where it is a rare boy's name, and the United Kingdom, where it is a very rare male name. Much less frequently, Piaras is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Piaras | Greece, Germany, Ireland, United Kingdom, United States |
| piaras feiritéar Irish poet, IE (b. 1600) |
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piaras beaslai Irish politician, author, playwright, biographer and translator, GB (b. 1881) |
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piaras ó dochartaigh Irish politician, IE (b. 1977) |
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| piaras ó gaora Irish radio broadcaster, IE |
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| piaras mac gearailt Irish poet |
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| piaras mag uidhir |
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