Semidi Islands is located in Pacific Ocean, 23 mi. SE of Sutwik Island and 80 mi. SW of Trinity Is., Aleutian Range
Although thought by some to have been discovered in 1741 by Captain Commander I. I. (Vitus) Bering, Imperial Russian Navy (IRN), and named "Tumannoi," meaning "foggy," the present name is derived from "O(stro)va Semidy ili Yevdokevskiye," meaning "Seven or Yevdokevskiye Islands," which was published by Lieutenant Sarichev, (1826, map 3), Imperial Russian Navy (IRN). The nine islands were identified on June 16, 1778, by Captain Cook (1785, v. 2, p. 410), RN, who wrote "We found it to be an island * * * lying in the latitude of 561000 * * * and it is distinguished in our chart by the name of Foggy Island; having reason to believe from its situation, that it is the same which had tha t name given to it by Beering." Commodore Joseph Billings, (in Sauer, 1802, p. 200), Imperial Russian Navy (IRN) called the islands "Simedan (or Simedun)" while von Langsdorff (1813-14, v. 2, p. 54), of the Russian embassy to Japan, published the name "Ewdokijefftian Islands" for this group. In 1868, US@C&GS called them "Seven Islands."