Jan Antonín Losy, Count of Losinthal (German: Johann Anton Losy von Losinthal); also known as Comte d'Logy (Losi or Lozi), (c. 1650 – 22 August 1721) was a Bohemian aristocrat, Baroque lute player and composer from Prague. His lute works combine the French style brisé with a more Italian cantabile style. He was probably the most significant lutenist-composer in Bohemia at the height of the lute's popularity there.