Sir Frederick Charles Thomson, 1st Baronet, KC (27 May 1875 – 21 April 1935) was a Scottish Unionist politician and lawyer.He was the third son of James Wishart Thomson of Glenpark, Balerno, Midlothian; James was a son of William Thomson, co-founder of the Ben Line.Educated at Edinburgh Academy, University College, Oxford and at Edinburgh University, he was called to the Scottish bar in 1901, and to the English bar in 1904.He served in Egypt as a Lieutenant with the Scottish Horse and in Salonika with the Lovat Scouts, where he was severely wounded.He was Unionist Member of Parliament for Aberdeen South from 1918 until his death.He was Parliamentary Private Secretary to Sir Robert Horne, 1919–1922, and a Junior Lord of the Treasury from February–April 1923.