Surname リーガー (Rieger 
, リーガー) , in the entire world, is a common family name. The cognomen リーガー is characteristic of Austria, where it is quite a common surname, Germany, and Czechia, where it is quite a rare surname. In absolute terms, it most frequently occurs in Germany, the United States, and Austria. Very seldom, リーガー is the forename as well as the last name.