(b Mainz, 1751; d Bonn, 1832).
Ger. publisher. Played hn. in Bonn court orch. with Beethoven. Founded publishing firm 1793 in Bonn, issuing many of Beethoven's works. Business continued by son and grandson. Firm moved to Berlin 1870. Publishers of Brahms's mus. Branches opened in London and Paris. Sold to Benjamin, of Hamburg, 1929.