Surname 鐳 (លុយ 
, Duit 
, 鐳 
) , throughout the world, is a common cognomen. The family name 鐳 is characteristic of Cambodia, where it is quite a common surname, Netherlands, where it is a rare surname, and Austria. Measured by absolute frequency, this name is the most popular in Cambodia, Indonesia, and Netherlands. Very seldom, 鐳 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| លុយ | Cambodia |
| Duit | Germany, United States, Netherlands, Indonesia, Malaysia |
| 鐳 | China |