Family name Ninen (Ninen 
, Ватанабэ 
) , in the entire world, is a very rare cognomen. The family name Ninen is habitual in Kyrgyzstan, where it is a very rare surname, Russia, where it is an extremely rare surname, and the United States. More prevalently, Ninen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ninen | Japan, Philippines, United States, India, Venezuela |
| Ватанабэ | Kyrgyzstan, Russia |