Cognomen Сычэн (Sicheng 
, Сычэн 
) , across the world, is a rare family name. The surname Сычэн is characteristic of Malaysia, where it is a very rare surname, Australia, and Indonesia. Not in comparison with a country's population, this name is the most popular in Indonesia, China, and Malaysia. Much more frequently, Сычэн is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sicheng | China, Indonesia, Malaysia, Australia, United States |
| Сычэн | Russia |