Surname Aario (Aario 
) , in the entire world, is a very rare family name. The cognomen Aario is habitual in Finland, where it is a rare surname, and Argentina, where it is an extremely rare surname. Much less frequently, Aario is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Aario | Finland, Argentina, Brazil, United States |
| aario alfred marist actor, CA (b. 1905) |
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| leo aario Finnish university teacher (1906-1998), FI (b. 1906) |
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| risto aario Finnish geologist, FI (b. 1937) |
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