Cognomen Кепплер (Keppler 
, Кепплер 
) , around the world, is quite a common family name. The last name Кепплер is characteristic of Germany, where it is quite a rare surname, Lithuania, where it is a rare surname, and Switzerland. In absolute terms, it is commonest in Germany, the United States, and Brazil. Much less frequently, Кепплер is the forename as well as the last name.