All around the world, ثانوس (Thanos 
, ثانوس) is quite a rare masculine forename. The forename ثانوس is habitual in Greece, where it is quite a common male name, Cyprus, where it is quite a rare masculine name, and Sweden, where it is a rare boy's name. In absolute terms, it most frequently occurs in Greece, Indonesia, and Cyprus. Likewise, ثانوس is the last name as well as the forename.
ثانوس is also a name for the fictitious and mythical characters: Thanos , the fictional character in Marvel Comics, Fortnite; Thanos , the fictional character from the Marvel Cinematic Universe, Avengers: Infinity War; Thanos Averroës , the fictional character from in the Lanfeust comics, Lanfeust of Troy and Thanos Sorentis , the theatrical character in the play "Karagkiozis".