Family name Tuitahi (Tuitahi 
) , globally, is a very rare cognomen. The last name Tuitahi is characteristic of New Zealand, where it is a very rare surname, Australia, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Australia, the United States, and New Zealand.
| VARIANT | COUNTRY |
|---|---|
| Tuitahi | New Zealand, Australia, United States, Canada |