Family name Đại Dương (Đại Dương 
) , throughout the world, is a very rare cognomen. The family name Đại Dương is characteristic of South-eastern Asia, particularly Vietnam, where it is a very rare surname. Likewise, Đại Dương is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Đại Dương | Japan, Vietnam |