When I decided to write about Douglas Island I asked myself who it could have been named for. The first thing that came to mind was David Douglas, the famous Scottish botanist (1799-1834) that the Douglas Fir was named after. That turned out to be wrong.
I knew that Richard Harris had mentioned Douglas Island in his 1881 writings, so the naming had to have been before that. It turns out, Douglas Island was named for John Douglas by Capt. George Vancouver.
John Douglas (July 14, 1721 – May 18, 1807) was a Scottish scholar and later became Bishop of Salisbury.