Alaska

When the Russians first came to the island of Unalaska, they were told that a vast country lay to the eastward and that its name was Al-ay-ek-sa. Their own island the Aleuts called Nagun-Alayeksa, meaning "the land lying near Alayeksa." 
The Russians in time came to call the country itself Alashka; the peninsula, Aliaska; and the island, Unalashka. Alaska is an English corruption of the original name.