Globally, Belyavtsev (Белявцев , Belyavtsev ) is an extremely rare unknown gender forename. Much more frequently, Belyavtsev is the last name as well as the forename.
Белиавцев, and Белявтцев
Mr, Alex, Ivan, Anton, Pavel, Yuriy, Dmitry, Vitaly, Aleksey, Alexandr, Vladimir, and Aleksander
, Belyavtsev 
) is an extremely rare unknown gender forename. Much more frequently, Belyavtsev is the last name as well as the forename.