Count Ferdinand Troyer (1 February 1780 – 23 July 1851) was an Austrian noble, philanthropist, and amateur clarinettist.
Born in Brünn (Brno), Moravia, Troyer became the chief steward to Archduke Rudolf of Austria-Tuscany.
It was noted that on 2 March 1817, Troyer played the obbligato to Wolfgang Amadeus Mozart's Parto for the Vienna Philharmonic Society at the Large Ridotto Room.
Because of the popularity of Ludwig van Beethoven's E-flat Septet, in early 1824, Troyer commissioned Franz Schubert to write a companion piece.
Schubert accepted the commission but enriched the seven-part instrumentation of Beethoven's septet with an additional violin to create an octet.