To the three geographical divisions correspond three well-marked ethnical groups - the Onas of the main island, the Yagans (Yahgans) of the south and the Alakalufs of the west.
With the settlement of the main island, which is now sometimes called Onisia, leaving the name of Tierra del Fuego to the archipelago, the Onas tribe has become fairly known.
The isolation of the Onas is peculiarly marked, inasmuch as they are an insular people who do not use boats.
They are hunters both on land and on the water, using the bow and arrow like the Onas, and building canoes often of large size.
Barclay, " The Land of Magallanes, with some account of the Onas and other Indians," Geographical Journal, vol.
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