Surname Radiul (Radiul 
, Радюль 
) , across the world, is a rare cognomen. The family name Radiul is habitual in Lithuania, where it is quite a rare surname, Belarus, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Russia, Lithuania, and Belarus. Likewise, Radiul is the forename as well as the last name.