Cognomen Mailefihi (Mailefihi 
) , in the entire world, is an extremely rare family name. Much more prevalently, Mailefihi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mailefihi | United States, New Zealand |
|
viliami tupoulahi tungī mailefihi Prince consort and Prime Minister of Tonga (1887-1941), TO (b. 1887) |
|
Taufa, Nuitupuivaha, Faaui-Siakumi, and Otuafi