Rear Admiral Sir Thomas Hounsom Butler Fellowes KCB DL (19 October 1827 – 26 March 1923)[2] was an English officer in the Royal Navy during the Victorian era.

[4] Fellowes entered the Royal Navy in 1845[3] and was promoted to lieutenant on 10 December 1852[5] and served in the flagship of Vice-Admiral William Fanshawe Martin, HMS Marlborough, in the Mediterranean Fleet.

[6] As captain of Dryad he commanded a Naval Brigade of 80 men during the 1868 Expedition to Abyssinia, seeing action at Arogye Pass and the Battle of Magdala.

[6] He was promoted to captain on 14 August 1868[5] for his services in the Abyssinian War and retired on 1 October 1873.

He and Margaret, 42 years his junior, had four sons, two of whom predeceased him:[3][10] Upon the death of Admiral Sir Algernon de Horsey in October 1922, Fellowes became the oldest living officer of the Royal Navy of flag rank.