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 | Brazil, India, Japan, Egypt, North Macedonia |
| Киро | Kazakhstan, Bulgaria, Kyrgyzstan, Russia, Ukraine |
| Cyro | Brazil, Philippines, Kenya, United States, Italy |
| Kyro | Brazil, Ethiopia, United States, Egypt, Finland |