Admiral of the Fleet Sir Somerset Arthur Gough-Calthorpe GCB, GCMG, CVO (1865–1937), sometimes known as Sir Somerset Calthorpe.
Gough-Calthorpe was educated at Stubbington House School before joining the Royal Navy in 1878.
In 1901 he commanded the HMS Pandora (1900) during propeller trials at Portsmouth, and on 1 January 1902 he was promoted to Captain and ordered to attend a course at the Royal Navy College. He was a military attaché observing the actions of the Russian Imperial Navy during the Russo-Japanese War (1904–1905).
Calthorpe was promoted to Rear-Admiral in 1911 and was Rear-Admiral in the 1st Battle Squadron from 1912. He commanded the 2nd Cruiser Squadron on the outbreak of the First World War. He served with the Grand Fleet under Sir John Jellicoe until May 1916 when he moved to the Admiralty as Second Sea Lord.
Calthorpe served at the Admiralty until December 1916 when he was appointed by the new incumbents, First Lord of the Admiralty Sir Edward Carson and First Sea Lord Sir John Jellicoe, as Admiral Commanding Coastguard and Reserves. In July 1917 Calthorpe was appointed Commander-in-Chief, Mediterranean Fleet.
Calthorpe signed the Armistice of Mudros on behalf of all the Allies on 30 October 1918, by which the Ottoman Empire accepted defeat and left the Central Powers, resulting in the 1920 Treaty of Sèvres.
In the post-war period Calthorpe served as British Commissioner in the Ottoman Empire from 1918 and then as Commander-in-Chief, Portsmouth from 1920. He became First and Principal Naval Aide-de-Camp to the King in 1924 and retired in 1930.