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First name origin & meaning:

Czechoslovakian: Famous ruler

First name variations: Radacek, Radan, Radik, Radko, Radouvsek, Radovs

Last name origin & meaning:

Polish and Czech: from the personal name Radek, a pet form of any of various Slavic personal names formed with rad- ‘glad’ as the first element. The most common such names are Radoslav (Polish Radosław), in which the second element means ‘glory’, and Radomir, in which the second element means ‘peace’.