autochthon(n = noun.person) - the earliest known inhabitants of a region;
is a kind of primitive, primitive person
1. One who is supposed to rise or spring from the ground or the soil he inhabits; one of the original inhabitants or aborigines; a native; -- commonly in the plural. This title was assumed by the ancient Greeks, particularly the Athenians. [1913 Webster]
2. That which is original to a particular country, or which had there its origin. [1913 Webster]
autochthon, n. (pl. autochthons or autochthones) (in pl.) the original or earliest known inhabitants of a country; aboriginals.
Derivative:
autochthonal adj. autochthonic adj. autochthonous adj.
Etymology:
Gk, = sprung from the earth (as AUTO-, khthon, -onos earth)