William Simms (7 December 1793 – 21 June 1860) was a British scientific instrument maker.
Sir George Clarke Simpson (2 September 1878 – 1 January 1965) was a British meteorologist. He was President of the Royal Meteorological Society 1940/41.
Shambhu Dayal Sinvhal (20 November 1923 - 27 May 2015) was an Indian mathematician, astronomist and a former vice chancellor of Kumaon University. Born on 20 November 1923 at Indore in the largest Indian state of Madhya Pradesh to B. D. Sinvhal and Tara Devi, he started his career as a member of the faculty of the department of mathematics and astronomy at Lucknow University in 1946 where he worked till 1954.