Surname Tangiwai (Tangiwai 
) , worldwide, is a very rare last name. The cognomen Tangiwai is habitual in Australia and New Zealand, particularly New Zealand, where it is a rare surname, and Australia, where it is a very rare surname. Likewise, Tangiwai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tangiwai | New Zealand, United Kingdom, Australia |