Anton (or Antonio) Diabelli was an Austrian music publisher, editor and composer. Best known in his time as a publisher, he is most familiar today as the composer of the waltz on which Ludwig van Beethoven wrote his set of thirty-three Diabelli Variations. Source: en.wikipedia.org.
Franz Peter Schubert was an Austrian composer of the late Classical and early Romantic eras. Source: en.wikipedia.org.
Franz Xaver Gruber was an Austrian primary school teacher, church organist and composer in the village of Arnsdorf, who is best known for composing the music to "Stille Nacht" ("Silent Night"). Source: en.wikipedia.org.
Wilhelm Grosz sometimes credited as Hugh Williams, was an Austrian composer, pianist, and conductor, who from 1934, worked in the UK, before moving to the USA in 1938. Source: en.wikipedia.org.
Johann Kaspar Mertz was a guitarist and composer from the Austrian Empire. Source: en.wikipedia.org.
Wolfgang Amadeus Mozart was a prolific and influential composer of the Classical period. Source: en.wikipedia.org.