Henryk Walecki (d. i. Maksymilian Horwitz)

– member of the Polish Socialist Party–Left (PPS-Lewica) from 1906; founding member of the Communist Part of Poland (KPP) in 1918 and a member of its Politburo; member of the Comintern from 1923; arrested and murdered in Moscow in the Stalinist purge of the ranks of the communist party in 1937.