3 mi. E of Great Sitkin I., Andreanof Islands., Aleutian Islands.
Aleut name published as "Ulak ile" or "Ylak Island," by Captain Lutke (1836, p. 323), Imperial Russian Navy (IRN), and is apparently of the same derivation as "O(strov) Ulyadak," or "Ulyadak Island," shown on Russian Hydrographic Dept. Chart 1400 in 1848. The Aleut name "Ulaq" means "house."
Aankuuga, Alugasux, Chalux, Chigulam Udaa, Chuguugix Iilamiizax, Chuhngudugis, Daa Agidgix, Hanisxa, Igitkin Bight, Iiqiisix, Naagix Adimtusix, Nahmagix, Ngam Ulaa, Nguugix Iilamiizax, Qahnichxucha, Qigaagix Adimtusix, Qigaangax, Saamlus, Shelter Cove, Tagalam Udaa, Ugiilagaadax, Ulgusix, Umak Bight, Uuhmugzux, Yoke Bay,
Aalux, Bugle Point, Cape Agumsadak, Cape Chakik, Cape Kagalus, Cape Ruin, Cape Umak, Cathedral Point, Elbow Point, Igitkin Point, Iqalax, Kingfisher Point, Knaxchiing, Moss Point, Narrows Point, Passage Point, Qatxayas Yaaga, Reach Point, Rip Point, Sulphur Point, Tanager Point, Uchixsax, Zaliva Point,