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 | Indonesia, Nepal, China, Malaysia, United States |
| Fachang | Philippines, China, India, United States, Nigeria |
| Ци | Belarus, China, Russia, Kazakhstan, Armenia |
| Цы | Kazakhstan, Russia |