Surname Sianos (Sianos 
) , across the world, is a rare cognomen. The last name Sianos is characteristic of Greece, where it is quite a rare surname, Cyprus, and Poland, where it is a rare surname. Much less frequently, Sianos is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sianos | Germany, Cyprus, Australia, Poland, Greece |
| georgios sianos researcher (ORCID 0000-0002-3042-0757) |
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| dionysios sianos GR |
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