Cognomen Киро (Kiro 
, Киро 
, Cyro 
) , all around the world, is a common family name. The surname Киро is habitual in North Macedonia, where it is a common surname, Bulgaria, where it is quite a common surname, and Finland, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in India, North Macedonia, and Bulgaria. Also, Киро is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kiro | Japan, Brazil, India, North Macedonia, Egypt |
| Киро | Bulgaria, Kazakhstan, Ukraine, Kyrgyzstan, Russia |
| Cyro | Kenya, Italy, Brazil, United States, Philippines |
| Kyro | Ethiopia, Brazil, Finland, United States, Egypt |