Last name Йоллер (Joller 
, Йоллер 
) , globally, is a rare surname. The cognomen Йоллер is habitual in Switzerland, where it is quite a rare surname, Estonia, and Germany, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Switzerland, the United States, and Estonia. Much less frequently, Йоллер is the forename as well as the last name.