Johannes Frederik Fröhlich (21 August 1806 – 21 May 1860) (or Frølich), a Danish violinist, conductor and composer, was a precursor of Niels Gade and J.P.E. Hartmann, and a central figure in Danish musical circles during the Romantic era.
He was a pupil of violinists Claus Schall and Friedrich Kuhlau. From 1827 he worked at the Royal Theatre, Copenhagen, where he was chief conductor from 1836. Fröhlich was a co-founder of the Music Society of Copenhagen and its first chairman. He wrote a symphony (in E-flat, Op. 33), and choral works and chamber music, as well as violin and piano compositions and a violin concerto. He wrote ballet music for the ballet-master and choreographer August Bournonville, founder of the Danish ballet tradition.
The main cache of his musical manuscripts is conserved in the Kongelige Bibliotek, Copenhagen.
op. 1 Strygekvartet nr. 1 i d-mol (1825)
op. 2 Strygekvartet nr. 2 i A-dur
op. 3 violinkoncerter (1825)
Ouverture til Kong Salomon og Jørgen Hattemager (1825)
op. 4 Koncertino for Violin (1826)
op. 6 Introduktion og Polonaise for Violin med Orkester
op. 7 violinkoncert
op. 14 violinkoncert
op. 15 Strygekvartet (1827)
op. 17 Strygekvartet (muligvis 3 kvartetter 1827)
op. 19 Kvartet for 4 Horn (1827)
op. 20 Koncertino for Violin og 4 horn (1827)
Ouverture til Freias Alter (1828)
op. 24 Introduktion og Rondo for Horn med Orkester (1829)
Sonate i a-mol for Piano og Fløjte
op. 30 Violinkoncert (1829)
op. 30 Symfoni (1830)
op. 33 Symfoni i Eb-dur
Natten før Brylluppet (syngespil 1829)
op. 39 koncertouverture for Orkester
op. 40 Marche og Jagtstykke for 9 Horn (1832)
Nina (ballet)
Tyrolerne (ballet)
Valdemar (ballet 1835)
Festen i Albano (ballet 1839)
Fædrelandets muser (ballet 1840)
op. 51 Erik Menveds Barndom (ballet - med Riberhusmarch - 1843)
Rafael (ballet 1845)
Hertas Offer (ballet)
Abekatten (vaudeville af Johanne Louise Heiberg)
Majgildet (ouverture)
Maurerbrüder hemmet nicht die Zähre
Kantate til Christian 8.s kroningsfest
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