Johann Friedrich Fasch (15 April 1688 – 5 December 1758) was a German violinist and composer.Fasch was born in the town of Buttelstedt, 11 km north of Weimar, the eldest child of schoolmaster Friedrich Georg Fasch and his wife Sophie Wegerig, from Leißling near Weißenfels. After his father's death in 1700, Fasch lived with his mother's brother, the clergyman Gottfried Wegerig in Göthewitz, and it was presumably in this way that he made the acquaintance of the Opera composer Reinhard Keiser.His works include cantatas, concertos, symphonies, and chamber music. None of his music was published in his lifetime, and according to The New Grove Dictionary of Music and Musicians in 2014, "it appears that most of his vocal works (including 9 complete cantata cycles, at least 14 masses and four operas) are lost, while the instrumental works are mostly extant.