Last name 西姆 (Sim 
, Seem 
, Siim 
) , around the world, is a widespread cognomen. The surname 西姆 is habitual in South-eastern Asia, particularly Malaysia, where it is a common surname, Singapore, and Brunei (explore the name in all countries). Not in comparison with a country's population, it is commonest in South-eastern Asia, particularly Malaysia, Singapore, and Indonesia. Much less frequently, 西姆 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sim | Singapore, United States, Indonesia, Malaysia, Algeria |
| Seem | Singapore, United States, India, Indonesia, Malaysia |
| Siim | Philippines, United States, United Kingdom, Malaysia, Algeria |
| 西姆 | China |