Cognomen Ruaño (Ruaño 
) , across the world, is a very rare last name. The last name Ruaño is characteristic of Southern Europe, particularly Spain, where it is a very rare surname. Very seldom, Ruaño is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruaño | Spain |
| roque ruaño Spanish civil engineer, ES (b. 1877) |
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| gualberto ruaño Puerto Rican scientist, US |
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| gualberto ruaño researcher |
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