Last name Yoonjoo (Yoonjoo 
) , around the world, is a rare cognomen. The surname Yoonjoo is habitual in Eastern Asia, particularly South Korea, where it is a rare surname, and China, where it is an extremely rare surname. Likewise, Yoonjoo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yoonjoo | China, South Korea, Australia, United States, Canada |