Sir Reginald Godfrey Otway Tupper (16 October 1859 – 5 March 1945) was a Royal Navy officer active during the late Victorian period and the First World War.

He joined the Royal Navy at the age of 14 in 1873, and saw active service during the 1890 Witu Expedition in East Africa, where he was mentioned in despatches.

[2] After the Armistice, in January 1919, Tupper was promoted to admiral and appointed Commander-in-Chief, Western Approaches, based at Queenstown (Cobh) in southern Ireland.

The war and Irish independence hit Tupper hard, coming from an Anglo-Irish background; he later wrote that he found it painful to think about the period.

In his twenties, he had written an article for the RUSI Journal arguing that there was no benefit to be gained by appointing naval officers through meritocratic competitive examination, so long as the sons of officers and gentlemen were numerous enough to "pass the standard required" and provide "brains sufficient to satisfy the scientific requirements of the Service".