John Hamilton Blair (29 July 1889 – September 1972) was a Scottish mariner, who was first officer aboard the SY Aurora during the Australasian Antarctic Expedition in 1913–1914.
During his early career, he worked aboard the Loch Line, which operated between Britain and Australia.
[1][2] The Blair Islands, in Commonwealth Bay in Antarctica, were named after him by Douglas Mawson, the expedition leader.
[3] He served as a lieutenant in the Royal Naval Reserve during the First World War, and was awarded the Distinguished Service Cross in 1917.
During the Second World War he returned to active service, commanding the boarding vessel Maron from 1940 to 1942, and then the auxiliary anti-aircraft ship Mona's Isle on the Tyne from 1942 to 1943.