Bogusław Radziwiłł was a Polish–Lithuanian princely magnate and a member of the szlachta (nobility). He belonged to the Radziwiłł magnate family. By birth he was an Imperial Prince of the Holy Roman Empire. He was a descendant of the famous knight, Zawisza the Black. Following the death of Janusz Radziwiłł, he briefly served as Grand Hetman of Swedish Lithuania.

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