(b Mattsee, Salzburg, 1781; d Vienna, 1858).
Austrian composer and publisher. Choirboy at Salzburg Cath. Encouraged to comp. by Michael Haydn. Went to Vienna in 1803 as teacher of pf. and guitar and as proof‐reader. Entered publishing 1818, founded Diabelli and Co.,1824, publishing works by Beethoven, Schubert, and Czerny. Wrote operetta, masses, pf. pieces, and songs. See Diabelli Variations.