Sydney Frederick Williams CMG (29 December 1866 – 12 May 1942) was a British Army Brigadier General.

Sydney Frederick Williams was born 29 December 1866, the son of the Rev.

Stephen Frederick Williams, the Rector of Cold Norton, Essex, England.

[1][3] On 17 November 1896 at St. Mary's Episcopal Cathedral, Edinburgh, Williams married May Grant Gwyer, the daughter of Cecil Francis Gwyer and Mary Stewart Mitchell of Edinburgh, Scotland.

[5] After completing his education at Haileybury, Williams entered the Royal Engineers on 18 February 1886.