Family name Estorer (Astore 
, Estorer 
) , in the entire world, is quite a rare last name. The surname Estorer is characteristic of Liechtenstein, where it is quite a common surname, Italy, where it is quite a rare surname, and Switzerland, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Italy, the United States, and Argentina. Very seldom, Estorer is the forename as well as the last name.