Surname Niiler (Niiler 
) , globally, is a very rare family name. The surname Niiler is habitual in Estonia, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Niiler | Estonia, United States |
| herbert niiler Estonian-American basketball player and coach, EE (b. 1905) |
|