Family name Chagayan (Chagayan 
, Чагаян 
) , in the world, is a rare surname. The cognomen Chagayan is habitual in Russia, where it is a very rare surname, Peru, and Ukraine, where it is an extremely rare surname. In absolute terms, it is the most numerous in Russia, Peru, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Chagayan | Russia, Peru, Mexico, United States, Brazil |
| Чагаян | Russia, Ukraine |