Johann van Beethoven (c. 1739 or 1740 – 18 December 1792) was a German musician, teacher, and singer who sang in the chapel of the Archbishop of Cologne, whose court was at Bonn.
 He is best known as the father of the celebrated composer Ludwig van Beethoven (1770–1827).
Wilhelm von Lenz (born 20 May 1809 in Riga - died 7 January 1883 in Saint Petersburg) was a Baltic German Russian official and writer.
 Wilhelm von Lenz was a friend of many mid-century Romantic composers, including Franz Liszt, Frédéric Chopin and Hector Berlioz, Lenz's most important and influential work was an early biography of the German composer Ludwig van Beethoven, entitled "Beethoven et ses trois styles" (1855), written in response to the disparagement of Beethoven by Alexander Ulybyshev in his "Nouvelle biographie de Mozart" (1843).
 Lenz promoted the idea (already suggested by earlier figures such as François-Joseph Fétis) that Beethoven's musical style be divided into three characteristic periods.
 Lenz's periodisation, with minor changes, is still widely used today by musicologists in discussing Beethoven's compositions.
Ludwig van Beethoven the Elder, also Ludovicus van Beethoven and Lodewijk van Beethoven (January 5, 1712 – December 24, 1773) was a professional singer and music director, best known as the grandfather of the composer Ludwig van Beethoven.
Ludwig van (full title: "Ludwig van: A report"; German: "Ludwig van: ein Bericht") is a black-and-white German film by Mauricio Kagel.
 Filmed in 1969, it was first screened the following year.
 The work was commissioned by Westdeutscher Rundfunk for the bicentennial celebrations of the birth of Ludwig van Beethoven in 1970.
 The film examines the reception of the composer and his works and how he has become a consumer product of the culture industry.
 The soundtrack is an arrangement of fragments of Beethoven's works, modified as if heard by the deaf composer himself; it is distinct from Kagel's 1970 composition "Ludwig van".
 Prominent contemporary artists including Dieter Roth, Stefan Wewerka (), Robert Filliou, and Joseph Beuys were involved in the design.
 According to "Gramophone", "at first it’s a laugh a minute ... then Kagel's film turns dark".
Beethoven Sonatas for Piano is the thirteenth album by pianist and composer Fazıl Say (1970) from Turkey.
 This album was recorded in June 2005 in Studio Tibor Varga (Sion, Switzerland) and released by Naïve Classique on October 11, 2005.
 "Beethoven Sonatas for Piano" features three piano sonatas by composer Ludwig van Beethoven (1770).
The Beethoven "Gesamtausgabe" is the first collected edition of the works of Ludwig van Beethoven.
 Its full title is "Ludwig van Beethovens Werke: vollständige kritisch durchgesehene überall berechtige Ausgabe" (which roughly translated means "Ludwig van Beethoven's Works: complete, critical, thoroughly revised, authorized edition").
 It was published between 1862 and 1865, with a supplementary volume appearing in 1888.
The Van Beethoven was an international train linking the Dutch capital Amsterdam and the West German capital Bonn.
 The train was named after the Bonn-born composer Ludwig van Beethoven.
Vincenzo Salvatore Carmelo Francesco Bellini (] ; 3 November 1801 – 23 September 1835) was an Italian opera composer, who was known for his long-flowing melodic lines for which he was named "the Swan of Catania".
Johanna van Beethoven (née Reiß [Reiss]; 1786–1869) was the sister-in-law of the composer Ludwig van Beethoven.
 She is remembered for the bitter custody battle between herself and the composer over her son Karl, one of the most ugly and traumatic episodes in the composer's life.
Ludwig van Beethoven ( , ; ] ; baptised 17 December 177026 March 1827) was a German composer and pianist.
 A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers.
 His best-known compositions include 9 symphonies, 5 piano concertos, 1 violin concerto, 32 piano sonatas, 16 string quartets, his great Mass the "Missa solemnis", and one opera, "Fidelio".

Question: Which composer also doubled as a pianist aside from being a composer Ludwig van Beethoven and Vincenzo Bellini?
Answer: Ludwig van Beethoven