What word is commonly used to describe residents of the South American pampas, chacos, or Patagonian grasslands?

Question

Who have lived for 20,000 years as hunter-gatherers, whose territory spans parts of South Africa, Zimbabwe, Lesotho, Mozambique, Swaziland, Botswana, Namibia, and Angola, centred on a large arid to semi-arid sandy area?

Answer 1

The ans is -
Gaucho