found: Weill, K. Die Dreigroschenoper [SR] c1982, p1958:label (Willy Trenk-Trebitsch)
found: I'll be yours, 1947, 2017:title frame (William Trenk, cast member)
found: IMDb, November 30, 2021(Willy Trenk-Trebitsch, actor; born March 11, 1902, in Vienna, Austria; active in motion pictures, 1930s-1970s; credits from the mid-1940s are for English-language films under the listed name William Trenk, although most credits are for German-language films and made-for-TV movies; name also given as Willi Trenk-Trebitsch, Willie Trenk; also directed TV movies in the 1960s; died September 21, 1983, in West Berlin, Germany)
found: German Wikipedia, via WWW, November 30, 2021(Willy Trenk-Trebitsch, Austrian actor; originally studied music before becoming an actor, debuting in the Deutschen Theater in Prague in 1927; best known for his performance as Mack the Knife from The threepenny opera by Bertolt Brecht, both at its Berlin and Prague premieres (1928) and on the first recording of the work (1930); fled to France in 1938, and then to the United States in 1940, where he worked in theater as well as supporting roles in films; returned to Germany in 1952)
