Adopted 7 February 1951 on 82L/SW, as labelled on R.D. McCaw's map, Okanagan Lake Valley, 1916, and on BC map 4J, 1921, and as identified in the 12th Report of the Okanagan Historical Society, 1948, p. 196.

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

The NE portion of this lake was formerly a discrete lake known as "Heart Lake"; the building of a dam for irrigation has caused these lakes to merge into one.

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

After George Hamilton Gordon (1847-1934), 7th Earl of Aberdeen, Governor-General of Canada 1893-98. In 1891 Lord Aberdeen bought the nearby Coldstream Ranch, of more than 13,000 acres from Forbes George Vernon for £50,000 (£49,000 in conveyance, 30 July 1894, £1000 having been deducted to settle a dispute about the condition of the fences and the number of cattle).
Aberdeen Lake and nearby Haddo Lake were named in the 1900's after Lord Aberdeen's second title, Lord Haddo, which was also the courtesy title of his eldest son, the Earl of Haddo (b.1879), who succeeded his father in 1934.

Source: Provincial Archives of BC "Place Names File" compiled 1945-1950 by A.G. Harvey from various sources, with subsequent additions