Cognomen Fianso (Fianso 
, Софьян 
) , throughout the world, is a rare surname. The family name Fianso is habitual in Kyrgyzstan, where it is quite a rare surname, Algeria, where it is a rare surname, and Morocco, where it is a very rare surname. In absolute terms, the name is most common in Algeria, Kyrgyzstan, and France. Also, Fianso is the forename as well as the last name.