Last name Регел (Regel 
, Reguel 
, Регел 
) , across the world, is quite a rare surname. The family name Регел is habitual in Germany, where it is quite a rare surname, Denmark, where it is a rare surname, and Switzerland. In absolute terms, it most frequently occurs in Germany, the United States, and Indonesia. Likewise, Регел is the forename as well as the last name.