What is "morozovs"

The Morozovs (Морозовы) is a famous Old Believers Russian family of merchants and entrepreneurs. The family name Morozov originates from a Russian word moroz (мороз) that means frost

The merchant family of Morozovs should not be confused with another famous Old Believer: boyarynya Feodosiya Morozova (and her family). The latter were boyars, whereas almost all the other famous Morozovs were merchants, and so descendants of peasants.