Mepụta ụdị nke ahịrịokwu a Duke Island bụ agwaetiti dị na Gravina Islands nke Alexander Archipelago na ndịda ọwụwa anyanwụ nke steeti US nke Alaska.
N'ezie, ụdị okwu dị mgbagwoju anya nke ahịrịokwu ahụ bụ "Duke Island bụ agwaetiti dị na Gravina Islands nke Alexander Archipelago na ndịda ọwụwa anyanwụ Alaska, na, dị n'ebe ugwu nke ókèala Canada. "