Cognomen บุ้ย (Bui 
, บุ้ย) , around the world, is a widespread surname. The cognomen บุ้ย 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). Not in comparison with a country's population, the name is most common in Vietnam, the United States, and Australia. Very seldom, บุ้ย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bui | Australia, Vietnam, India, Malaysia, United States |