Commodore Sir Thomas Erasmus Barlow, 3rd Baronet DSC, DL (23 January 1914 – 12 October 2003) was an officer in the Royal Navy.

His maternal grandfather was Horace Darwin, and amongst his great-grandfathers were the naturalist Charles Darwin, the statistician and civil servant Thomas Farrer, 1st Baron Farrer, and the royal physician Sir Thomas Barlow.

After being educated at Winchester College, Barlow entered the Royal Navy in 1932 as a Cadet.

He married Isabel Body (1915–2005), daughter of the medical doctor Thomas Munn Body, on 9 July 1955 and they had four children: Barlow succeeded to the title of 3rd Baronet Barlow, of Wimpole Street, London on 28 February 1968, after the death of his father.

In 1997 Sir Thomas, along with his brother Erasmus Barlow were both awarded honorary Doctors of Letters degrees by the University of Sussex, who were bequeathed the Barlow Collection in 1968 on the death of Sir Alan[2]