Last name Cậu Út (Cậu Út 
) , around the globe, is a very rare surname. The family name Cậu Út is habitual in South-eastern Asia, particularly Vietnam, where it is a very rare surname. More prevalently, Cậu Út is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cậu Út | Vietnam, Japan |