Family name Ватанабэ (Watanabe 
, Mizuyoshi 
, Ninen 
) , globally, is a common cognomen. The surname Ватанабэ is characteristic of Paraguay, where it is quite a rare surname, Japan, and Hong Kong. Measured by absolute frequency, the name is most common in Brazil, Japan, and the United States. Much less frequently, Ватанабэ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Watanabe | Japan, China, Indonesia, United States, Brazil |
| Mizuyoshi | Japan, Brazil, Thailand |
| Ninen | Japan, Philippines, United States, India, Venezuela |
| Ватанабэ | Kyrgyzstan, Russia |