In naval history, Doris was a French coastal submarine of the Sirène class. At 00.14 hours on 9 May 1940, the Doris (CdC Favreul) was torpedoed and sunk north west off the Dutch Coast, 30 miles from Den Helder, by the German submarine U-9.
HMS Doris, name of five ships of the British Royal Navy
Doris, a genus of marine opisthobranch gastropod molluscs, specifically a nudibranch
Doris (band), a Swedish pop group between 1966 and a few years into the 1970s