Family name Ngahana-Hartley (Ngahana-Hartley 
) , all over the world, is an extremely rare last name. The cognomen Ngahana-Hartley is habitual in Australia and New Zealand, particularly New Zealand, where it is a very rare surname. Parts of the name also exists independently as a first name Ngahana, and a last name Hartley.
| VARIANT | COUNTRY |
|---|---|
| Ngahana-Hartley | New Zealand |