Admiral Edwin Clayton Tennyson d'Eyncourt CB (4 July 1813 – 14 January 1903) was an officer in the Royal Navy.

Edwin was the second son of Charles Tennyson d'Eyncourt and Frances Mary Hutton, the only child and heiress of the Rev.

As a young man, he thoroughly embodied his family's social pretensions and their snobbish behaviour towards their poor relations, the Tennysons of Somersby;[1] but in later years the mutual dislike between him and his famous cousin thawed, and he gave Alfred advice on the law of propriety of accepting the peerage offered to him in 1883.

[4] He served in the South American, East Indies and China Stations during the 1840s, and the HMS Calliope took part in the capture of Canton during the First Opium War.

[8] On 1 March 1859, Tennyson d'Eyncourt was married to Lady Henrietta Pelham-Clinton (1819–1890), the youngest surviving daughter of Henry Pelham-Clinton, 4th Duke of Newcastle and his wife, the former Georgiana Elizabeth Mundy (daughter and heiress of Edward Miller Mundy of Shipley Hall).