Surname ดอ (Do 
, ดอ 
) , across the world, is a widespread cognomen. The cognomen ดอ is characteristic of Vietnam, where it is quite a common surname, Macao, and Guernsey (explore the name in all countries). In absolute terms, it is commonest in Vietnam, Egypt, and India. Likewise, ดอ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Do | Myanmar, Vietnam, Egypt, United States, India |
| ดอ | Thailand |