Cognomen โด (Do 
, By , โด 
) , globally, is a widespread last name. The last name โด is habitual in Vietnam, where it is quite a common surname, Macao, and Guernsey (explore the name in all countries). Not in comparison with a country's population, it is commonest in Vietnam, Egypt, and India. Likewise, โด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Do, By | Myanmar, Vietnam, United States, Egypt, India |
| โด | Thailand |