František Kočvara, known later in England as Frantisek Kotzwara (1730 – September 2, 1791), was a Czech violist, virtuoso double bassist and composer.His death was one of the first recorded instances of death by erotic asphyxiation.Kotzwara was born in Prague, Bohemia, and was something of a nomad. He travelled around Europe and performed with various orchestras. His mature career was based in England, where his compositions were published from 1775 onwards. These include string quartets, serenades and string trios. In London he played in the Concerts of Antient Music, in the Handel Commemoration of 1791 and in the orchestra of the King's Theatre.