1) Slavic surname 
Belousov is a Russian surname formed from the nickname Belye Usy (Белые Усы) meaning `White Moustache`, and in the patronymic form. The English equivalent would be `Grey Moustache`, inferring to someone older and grey-haired, i.e. wise`. The feminine form of the surname is Belousova. The Ukrainian language name of the same derivation ...