The Thule (pronounced /ˈtuːliː/) or proto-Inuit were the ancestors of all modern Inuit. They developed in coastal Alaska by AD 1000 and expanded eastwards across Canada, reaching Greenland by the 13th century.[1] In the process, they replaced people of the earlier Dorset culture that had previously inhabited the region. The appellation “Thule” originates from the location of Thule (in 1953 relocated to Qaanaaq) in northwest Greenland, facing Canada, where the archaeological remains of the people were first found at Comer’s Midden. The links between the Thule and the Inuit are biological, cultural, and linguistic.

http://en.wikipedia.org/wiki/Thule_people