Cognomen Dongjoo (Dongjoo 
) , all over the world, is a very rare last name. The surname Dongjoo is characteristic of China, where it is an extremely rare surname, and the United States. Much more frequently, Dongjoo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dongjoo | China, South Korea, United States, Canada, New Zealand |