on SE coast of Lemesurier I., in %south Passage, 3 mi. S of Lemesurier Lightand 25 mi. NW of Hoonah, St Elias Mts.
Named by G. C. Hanus, U.S. Navy (USN), in 1880 for Richard S. Willoughby, "an Alaskan pioneer." The name was published by U.S. Coast and Geodetic Survey (USC&GS) in the 1883 Alaska Coast Pilot (p. 190). Willoughby came to Alaska about 1860 and is mentioned in Alexander Badlam's "Wonders of Alaska," (1890, p. 127-131), in which Badlam describes "Willoughby's Mirage" on Muir Glacier.