Cognomen บุ่ย (Bui 
, บุ่ย) , in all the world, is a widespread family name. The cognomen บุ่ย is characteristic of Macao, where it is a common surname, Vietnam, where it is quite a common surname, and British Virgin Islands (explore the name in all countries). In absolute terms, it is the most numerous in Vietnam, the United States, and Australia. Very seldom, บุ่ย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bui | Australia, Vietnam, United States, India, Malaysia |