Family name Тьери (Tieri 
, Тьери 
) , around the world, is quite a rare surname. The cognomen Тьери is characteristic of Argentina, where it is quite a rare surname, Italy, where it is a rare surname, and Uruguay. Not in comparison with a country's population, the name is most common in Argentina, Italy, and the United States. Much less frequently, Тьери is the forename as well as the last name.