List of Famous people with last name Rennell

James Rennell Rodd, 1st Baron Rennell,, known as Sir Rennell Rodd before 1933, was a British diplomat, poet and politician. He served as British Ambassador to Italy during the First World War.

Major-General Francis James Rennell Rodd, 2nd Baron Rennell, was an army officer and the second but eldest surviving son of the diplomat Rennell Rodd, 1st Baron Rennell. He served with distinction as a Chief of Civil Affairs in the Mediterranean theatre of war 1941-44.

John Adrian Tremayne Rodd, 3rd Baron Rennell was a British naval officer, Scottish rugby union player and businessman. He succeeded his uncle as 3rd Baron Rennell in 1978, and sat on the Conservative Party benches in the House of Lords.

Major James Rennell, FRS FRSE FRGS was an English geographer, historian and a pioneer of oceanography. Rennell produced some of the first accurate maps of Bengal at one inch to five miles as well as accurate outlines of India and served as Surveyor General of Bengal. Rennell has been called the Father of Oceanography. In 1830 he was one of the founders of the Royal Geographical Society in London.