English clergyman from Little Bridge, Devon who graduated from Cambridge University (BA (Cantab.) 1868). He became Curate at Ashbourne, Derbyshire (1869-1871), then at Battlesden, Bedfordshire (1872-1873), Paddington, London (1873-1874) and later at Thorncombe in Somerset (1881-1882). An amateur botanist and keen entomologist, Eaton joined the Challenger Expedition (1872-1876) and the Transit of Venus Expedition (1874-1875) as naturalist. He collected flora and fauna from Kerguelen Island during the Transit of Venus Expedition (October 1874 to February 1875) and also at the Cape (July to September 1874) during supplying for the expedition. He was later Vicar at Shepton Montague in Somerset (1887-1892). Cryptogamic material from the Challenger Expedition at K was largely transferred to BM (c. 1961) under the terms of the Morton Agreement, though fungal material was reciprocally transferred from BM to K. The fungi Daedalea eatonii Berk. (= Gloeophyllum trabeum (Pers.) Murrill) and Galera eatonii Sacc. are named after him.