Aaron Williams (1731–1776) was a Welsh teacher, composer, and compiler of West Gallery music, active in England during the 18th century.
Williams was probably born in Caldicot, Monmouthshire, the son of William Morgan. He served as clerk of the Presbyterian Scots Church, London Wall.
Williams's publications include:
These publications included several fuguing tunes. Six of his anthems were included in Thomas Williams's Harmonia Coelestis (1780).
The unorthodox harmonic idiom of the First New England School of choral composers shows the influence of English composers such as Williams and William Tans'ur:
For the most part the Yankee composer's source of information about harmonic practices derived from the music and writings on music of such comparatively unskilled English composers as William Tans'ur (1796-1783) and Aaron Williams (1731-1776), who were themselves somewhat outside the mainstream of European sacred music. Many of the traits that may be thought unique to American psalmodists in fact characterize the compositions of their British cousins too.
In particular, "it is clear that [William Billings] had studied the works of English psalmodists such as William Tansur and Aaron Williams."
Williams's tune "St. Thomas" was originally the second quarter of his longer "Holborn," published in his Universal Psalmodist (1763) and attributed to him based on the statement there, "never before printed." It was first published in its shortened form in Thomas Knibb's The Psalm-Singer's Help (c. 1769), included by Williams in his 1770 New Universal Psalmodist, and printed again in Isaac Smith's A Collection of Psalm Tunes (c. 1780).
In the United States, "St. Thomas" was published in several shape note tunebooks, including the following: