(b Rohrau, 1737; d Salzburg, 1806).
Austrian‐born composer, brother of Franz Joseph Haydn. Chorister, St Stephen's, Vienna, 1745–55, also deputy org. Court mus. and Konzertmeister to Archbishops of Salzburg 1763 to end of his life. Wrote 40 syms., vn. concs., hn. concs., tpt. conc., hpd.‐and‐va. conc., fl. concs., 12 str. quartets, operas, masses, and vast amount of other church mus. Weber and Diabelli were among his pupils. His Requiem in C minor was perf. at his brother's funeral.