Family name Тьер (Thiers 
, Tyer 
, Тьер 
) , all around the world, is quite a rare cognomen. The cognomen Тьер is characteristic of Belgium, where it is quite a rare surname, France, and Chile, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the United States, France, and Belgium. Much less frequently, Тьер is the forename as well as the last name.