Cognomen Quan Tâm (Quan Tâm 
) , around the globe, is a very rare last name. The cognomen Quan Tâm is characteristic of South-eastern Asia, particularly Vietnam, where it is a very rare surname. Likewise, Quan Tâm is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Quan Tâm | Vietnam |