Family name Hanrahan-Tan (Hanrahan-Tan 
) , globally, is an extremely rare last name. The last name Hanrahan-Tan is habitual in Australia and New Zealand, particularly Australia, where it is a very rare surname. Parts of the name also exists independently as a last name Hanrahan, and a last name Tan.
| VARIANT | COUNTRY |
|---|---|
| Hanrahan-Tan | Australia |