Cognomen Иси (石 
, Ishi 
, Isi 
) , globally, is a prevalent last name. The cognomen Иси is habitual in China, where it is a common surname, Albania, where it is quite a rare surname, and Azerbaijan. In absolute terms, the name is most common in China, India, and Nigeria. Very seldom, Иси is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 石 | China |
| Ishi | Nigeria, Indonesia, Japan, India, China |
| Isi | Nigeria, Indonesia, India, China, Azerbaijan |
| Иси | Russia |