Cracroft Island adopted 4 September 1947 on C.3584, as labelled on British Admiralty Chart 581, 1867 et seq. Form of name changed to Cracroft Islands (plural) 7 April 1955 on C.3567, as recommended by Hydrographic Service (on the same date, the names West Cracroft Island and East Cracroft Island were also adopted).

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

"Named in 1861 by Captain Richards, HMS Plumper, after Sophia Cracroft, niece of Sir John Franklin, the noted Arctic explorer who died during the ill-fated expedition on 1847. Miss Cracroft was on this coast with Lady Franklin in 1861, and resided with her in England until the latter's death in 1875. The Sophia islets off the southwest shore of the island, and Cracroft Point are named after her, and the Franklin Range on the opposite side of Johnstone Strait after Sir John and Lady Franklin."

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)