Jan von Klewitz ( born March 7, 1964 in Zagreb ) is a German jazz saxophonist.
From Klewitz spent part of his childhood in Copenhagen, where he received his first piano lessons. From 1972, he lived with his family in Berlin, where he only got clarinet and later saxophone lessons from 1976th After high school studied at the Cologne University of Music and was a member of Youth Jazz Orchestra Rheinland-Pfalz, with whom he went on several tours abroad (USA, Malta). During his studies he worked with Gene Mighty Flea Connors, Ulla Oster Beyond Janis, the band Heinz, Georg Ruby, Dieter Manderscheid and Reinhard Kobialka. He was also involved in several albums of productions JazzHausMusik. In 1991 he moved back to Berlin, where he founded his own quartet with Wolfgang Köhler, Henning Sieverts and Bill Elgart. He became a member of the German-French Jazz Ensemble under the direction of Albert Mangelsdorff and Berlin Contemporary Jazz Orchestra with Alexander von Schlippenbach, Evan Parker, Aki Takase and Ernst Ludwig Petrowsky. He also played in a double quartet Double Dose with Conny and Matthias Bauer and the quartet Gossip and Heinz Sauer. At this time played Klewitz addition to numerous film music productions with Wolfgang Dauner, Stefan Lotter man, John Schroeder, Steve Argüelles, Rudi Neuwirth, Michel Godard, Bob Degen and Christopher Dell. He went on numerous national and international festivals such as the North Sea Jazz Festival, the Jazz Baltica or the International Burghausen Jazz Week and was for the Goethe-Institut with the band Yakou Tribe on Africa tour. In 2007 he played with Christian von Kaphengsts Quartet Cafe Du Sport in India and Pakistan. For the existing since 1999 Quartet Yakou Tribe  (with Kai Brückner (g), Johannes Gunkel (b), and Rainer Winch (d)), he also composes his own pieces. Together with pianist Markus Burger he has presented a series of now four CDs with spiritual standards, which make use of both and European hymns. He also plays in the Wülker Group in Jazz Indeed with Michael Schiefel as a singer and with Thärichens Tentett headed by Nicolai Thärichen. Jan von Klewitz is the brother of Anti von Klewitz.