Last name ดั้ง (Dang 
, 段 , ดั้ง) , worldwide, is a prevalent cognomen. The cognomen ดั้ง is characteristic of China, where it is a common surname, Vietnam, where it is quite a common surname, and Macao (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in China, Vietnam, and India. Much less frequently, ดั้ง is the forename as well as the last name.