Cognomen ดาด (Dat 
, ดาด 
) , in the world, is a common last name. The surname ดาด is characteristic of Aland Islands, where it is quite a common surname, Vietnam, where it is quite a rare surname, and Bahamas. In absolute terms, this name is the most popular in India, Vietnam, and Malaysia. Also, ดาด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dat | Myanmar, Vietnam, United States, India, Malaysia |
| ดาด | Thailand |