Surname Триантафиллу (Triantafyllou 
, Triantafillou 
, Триантафиллу 
) , all over the world, is a common last name. The cognomen Триантафиллу is habitual in Greece, where it is a common surname, Cyprus, where it is quite a common surname, and Australia, where it is a rare surname. In absolute terms, it most frequently occurs in Greece, the United States, and Cyprus.
| VARIANT | COUNTRY |
|---|---|
| Triantafyllou | Germany, Cyprus, Australia, United States, Greece |
| Triantafillou | Germany, Canada, Australia, United States, Greece |
| Триантафиллу | Russia |