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Family name Niwa (ニワ , Niwa
, 丹羽
, among others...) , in all the world, is quite a rare surname. The cognomen Niwa is habitual in Isle of Man, where it is quite a rare surname, New Zealand, where it is a rare surname, and Singapore. In absolute terms, this name is the most popular in Indonesia, Japan, and China. More frequently, Niwa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ニワ | Japan |
| Niwa | Poland, Japan, Indonesia, United States, China |
| 丹羽 | China |
| Нива | Kazakhstan, Kyrgyzstan, Russia, Ukraine |