Alfred Wotquenne (French: [wɔtkɛn]; 25 January 1867 – 25 September 1939) was a Belgian musical bibliographer, best known for his catalogues of the works of Carl Philipp Emanuel Bach and Christoph Willibald Gluck.
Wotquenne was born in Lobbes, Hainault, Belgium. He studied at the Royal Conservatory of Brussels under Louis Brassin (piano), Alphonse Mailly (organ), Dupont and François-Auguste Gevaert (theory).
In 1894 he was appointed the librarian of the conservatoire and he retained this post until 1918. In his time the library acquired a great many works, both printed and in manuscript.
He published bibliographical studies on the works of Baldassare Galuppi (1900), Christoph Willibald Gluck (1905), Carl Philipp Emanuel Bach (1906) and Luigi Rossi (1909). He also contributed to a complete inventory of the works of André Grétry.
The works of C. P. E. Bach came to be known by their Wq numbers (from Wotquenne's catalogue). They are now also known by their H numbers, from a new catalogue by Eugene Helm (1989). A concordance between these systems is available.
- Catalogue thématique des œuvres de Chr. W. v. Gluck. Breitkopf & Härtel, Leipzig 1904
- Catalogue thématique des œuvres de Charles Philippe Emmanuel Bach (1714-1788). Breitkopf & Härtel, Leipzig 1905
- Grove's Dictionary of Music and Musicians, 5th ed, 1954, Vol. IX, p. 368
- Indexes, Concordances, and Other Material for the Study of Music by C.P.E. Bach