W. Sidney Allen
| William Sidney Allen | |
|---|---|
| Photograph of Allen c.1982, from his obituary in the Proceedings of the British Academy | |
| Born | 18 March 1918 London | 
| Died | 22 April 2004 (aged 86) | 
| Nationality | British | 
| Occupation | Academic | 
| Spouses | Aenea McCallum   (m. 1955; died 1996) Diana Stroud  (m. 2002) | 
| Academic background | |
| Alma mater | Trinity College, Cambridge | 
| Thesis | Linguistic problems and their treatment in antiquity (1948) | 
| Doctoral advisor | A. J. Beattie | 
| Academic work | |
| Discipline | Classical Philology, Linguistics | 
| Sub-discipline | Historical linguistics, Sanskrit, Indo-European phonology. | 
| Institutions | School of Oriental & African Studies, London, Trinity College, Cambridge | 
| Notable works | Vox Latina (1965); Vox Graeca (1968) | 
William Sidney Allen, FBA (18 March 1918 – 22 April 2004), was a British linguist and philologist, best known for his work on Indo-European phonology.