If you're looking for the one with no male descent, we claim no certainty.
Videos of some of the most isolated tribes released from previous years that captured naked tribal members include groups of both sexes of all ages.
Shot in 2011 by FUNAI, this video showed several members of the Kawahiva tribe walking through dense foliage. Naked men can be seen holding bows and arrows, and a woman carries a child on her back.
Another footage was released showing naked tribal men except for belts and loincloths and carry different weapons, including bows and arrows and spears.
And, a rare video, shot by forest rangers in Monte Salvado in Madre de Dios, showed the world of the long isolated Peru tribe of Mashco-Piro Indians.
No one knows for sure how many uncontacted tribes are still left. At a rough guess, there are probably more than 100 around the world, mostly in Amazonia and New Guinea, according to Survival International.
Brazil’s count is likely to be the most accurate. FUNAI has identified 77 uncontacted tribes through aerial surveys, and by speaking to more Westernised indigenous groups about their neighbours.