Last name Mailau (Mailau 
) , in all the world, is a rare family name. The last name Mailau is characteristic of Papua New Guinea, where it is quite a rare surname, Australia, where it is a very rare surname, and New Zealand. Measured by absolute frequency, the name is most common in Papua New Guinea, Indonesia, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Mailau | Indonesia, Australia, United States, Papua New Guinea, New Zealand |
| tevita mailau Tongan rugby union player, NZ (b. 1985) |
|