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