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Cognomen Firsov (Фирсов , Firsov , Фірсов ) , worldwide, is a common family name. The last name Firsov is characteristic of Russia, where it is quite a common surname, Belarus, where it is quite a rare surname, and Kazakhstan. Not in comparison with a country's population, it most frequently occurs in Russia, Ukraine, and Kazakhstan.
Mr, Maxim, Sasha, Slava, Aleks, Anton, Artem, Boris, Pavel, Peter, Roman, Denis, Danil, Tania, Tolik, Vadim, Fedor, Irina, Yuriy, Marcel, Maksim, Mihail, Yury, Sergey, Yuri, Olga, Max, Nik, Val, Ira, Uwe, Maks, Serg, Stas, Alex, Anna, Petr, Dima, Gleb, Juri, Egor, Vera, Vlad, Ilan, Ilya, Ivan, Igor, Oleg, and Sergei