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Worldwide, Firsov (Фирсов , Firsov , Фірсов ) is a very rare boy's given name. The forename Firsov is characteristic of Poland, where it is a very rare male name, and China, where it is an extremely rare male name. Much more prevalently, Firsov is the last name as well as the forename.
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