Adopted 5 May 1925 on C.320 as recommended by Hydrographic Service, not "Sunday Island" as labelled on British Admiralty Chart 2449, published in 1969 from surveys by Capt. Pender.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

Named in 1876 by the Hydrographic Office, British Admiralty, after Capt. Alfred John Chatfield, RN (1831-1910). While captain of HMS Amethyst, Chatfield escorted the Earl of Dufferin, then Governor General of Canada, and the Countess of Dufferin, on a cruise of the inside channels of the coast of British Columbia, August & September 1876. Upon their return to San Francisco, Lady Dufferin was asked to review the Admiralty Chart and bestow names on various unnamed features, hence Amethyst Cascade, Dufferin Island & Countess of Dufferin Range. (ref: Journals of Lady Dufferin). Chatfield entered the Navy 1846; lieutenant 1854; served during the Crimean War, 1854-56 and later in NW Africa; commander 1862; captain 1868; served on this coast 1875-1878; Rear admiral 1886; appointed CB 1887; Vice admiral, retired 1891.

Source: Walbran, John T; British Columbia Coast Names, 1592-1906: their origin and history; Ottawa, 1909 (republished for the Vancouver Public Library by J.J. Douglas Ltd, Vancouver, 1971)

Chatfield was born at Stratford, 27 August 1831, son of Rev. Robert Money Chatfield and Anna Maria Jesson. At one point Chatfield was managing director of the Royal Mail. Died 25 August 1910. (Information provided in 1994 by grandson, the current Lord Chatfield, living at Oak Bay, Victoria)

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office