Surname 碧海 (碧海 
) , globally, is quite a rare family name. The last name 碧海 is habitual in Eastern Asia, particularly China, where it is a very rare surname. More prevalently, 碧海 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 碧海 | China |
| 碧海純一 Japanese legal philosopher (1924–2003), JP (b. 1924) |
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