Last name Hrólfr (Rolf 
, Hrólfur 
, Hrólfr) , in all the world, is a common family name. The cognomen Hrólfr is characteristic of Liechtenstein, where it is quite a common surname, Eswatini, where it is quite a rare surname, and Sweden. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Spain. Much more frequently, Hrólfr is the forename as well as the last name.