Last name Ци (Qi 
, Fachang 
, Ци 
) , globally, is a prevalent family name. The last name Ци is habitual in Cayman Islands, where it is a common surname, Bermuda, and Malaysia (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in China, Malaysia, and Indonesia. Much less frequently, Ци is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Qi | Malaysia, Nepal, United States, Indonesia, China |
| Fachang | Philippines, India, Nigeria, United States, China |
| Ци | Kazakhstan, Russia, Armenia, Belarus, China |
| Цы | Kazakhstan, Russia |