Mozart's name Mozart's father Leopold announced the birth of his son in a letter to the publisher Johann Jakob Lotter with the words "... the boy is called Joannes Chrisostomus, Wolfgang, Gottlieb" (""der Bub heißt Joannes Chrisostomus, Wolfgang, Gottlieb"" in German). The baptismal names "Joannes" and "Chrysostomus" also have German equivalents, namely "Johann" and "Chrysostomos" (or less frequently, "Chrysostom"). The widely used "Grove Dictionary of Music and Musicians" employs these versions in the heading name for its Mozart article, which parenthesizes the little-used baptismal names: "(Johann Chrysostom) Wolfgang Amadeus Mozart." Here are the details of the various names given on the register:
Wolfgang Amadeus Mozart Theme from Mozart's Opera "Die Zauberflöte" (1822), Frédéric Chopin's Variations on "Là ci darem la mano" from "Don Giovanni" (1827), and Max Reger's Variations and Fugue on a Theme by Mozart (1914), based on the variation theme in the piano sonata K. 331; Pyotr Ilyich Tchaikovsky wrote his Orchestral Suite No. 4 in G, "Mozartiana" (1887), as a tribute to Mozart. For unambiguous identification of works by Mozart, a "Köchel catalogue number" is used. This is a unique number assigned, in regular chronological order, to every one of his known works. A work is referenced by the abbreviation "K." or