Brigadier Sir Robert Duncan Harris Arundell, KCMG, OBE (22 July 1904 – 24 March 1989)[1] was a British diplomat who became Governor and Commander in Chief of the Windward Islands and later Governor of Barbados and acting Governor-General of the West Indies.

Robert Duncan Harris Arundell was born on 22 July 1904 at Lifton, Devon, the son of Constantine Harris Arundell (1862–1945) and his wife Katherine Juliana (1865–1957), daughter of the Reverend Robert Hole, rector of North Tawton.

He was seconded to the Forces in 1941 for appointment to occupied territory administration, and, in 1945, was Chief Civil Affairs Officer, Middle East, with the rank of Brigadier.

In 1961, he sold his house, Court Green, in North Tawton to Sylvia Plath and Ted Hughes.

On 14 November 1929, he married Joan (1904–1984), daughter of Captain John Alexander Ingles, Royal Navy, and his wife Annie Marie Dease.