Athro Charles Knight (1 September 1878 - 10 May 1958) was a solicitor and local politician. He was the son of Athro Alfred Knight, a school master from Brockley in the Kent suburbs of London. After attending Dulwich College, he studied law at Lincoln's Inn, and in 1902 qualified as a solicitor. He married Violet Evelyn Turner in 1905, and they had one daughter. By 1911 he was living in Forest Hill. He became a senior partner in the law company of Mackrell, Ward & Knight, based in the City of London.