Alexander John Ellis (or Alexander Sharpe) (14 June, 1814 - 28 October, 1890) was an English philologist and music theorist. He is noted for translating and extensively annotating Hermann Helmholtz's On the Sensations of Tone, in which he among other things introduces the notation of cents for musical intervals.

Reference

• M. K. C. MacMahon, ‘Ellis , Alexander John (1814–1890)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 14 June 2006

1814 births | 1890 deaths | Music theorists | English philologists

Alexander Ellis