K Acting Klaus Mertens Born April 25, 1949 · Kleve, Germany (age 77) No biography available. ↗ Share Known For‹Wilhelm Friedemann Bach - Cantatas · 2010Wilhelm Friedemann Bach - Cantatas2010MovieMusic▶+Ton Koopman plays Bach · 2004Ton Koopman plays Bach2004MovieMusic▶+› FilmographySortPopularNewestTop ratedWilhelm Friedemann Bach - Cantatas · 2010Wilhelm Friedemann Bach - Cantatas2010MovieMusic▶+Self - BassTon Koopman plays Bach · 2004Ton Koopman plays Bach2004MovieMusic▶+Self - Baritone
