Cognomen צ'י (Chi 
, Kyi 
, צ'י 
) , around the globe, is a widespread last name. The family name צ'י is habitual in Mongolia, where it is a widespread surname, Myanmar, and Bermuda, where it is a common surname (explore the name in all countries). Measured by absolute frequency, it is commonest in Myanmar, China, and Mexico. Likewise, צ'י is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chi | Malaysia, China, Mexico, Vietnam, Myanmar |
| Kyi | Malaysia, China, United States, Mongolia, Myanmar |
| צ'י | Israel |