Günter Witepski came to the Netherlands as a refugee from Germany in 1933. At that time, he was registered as a 'merchant'. In the thirties, he performed as a singer and actor with the "Ping Pong" ensemble. He also co-authored and performed in the cabarets that were staged in camp Westerbork.
Source: Katja B. Zaich, “Ich bitte dringend um ein Happyend.“ Deutsche Bühnenkünstler im niederländischen Exil 1933-1945 (Frankfurt am Main, 2001), 63, 248.