Can only relate what group uses it.
In this century Mathematicians and scientists.
“Ouroboros is an ancient infinity symbol which has been used widely in many different cultures throughout the world during the course of history. The symbol is depicted as a snake eating its own tail. ...
The first known appearance of the ouroboros motif is in the Enigmatic Book of the Netherworld, an ancient Egyptian funerary text in KV62, the tomb of Tutankhamun, in the 14th century BC.
When it was used around 1600 B.C. by the Egyptians for the first time in the history the Ouroboros was considered as the symbol of the sun and it was believed to have represented Aten’s travels (Aten is the sun disk in the Egyptian mythology).”
http://mankatotimes.com/2013/11/29/i-salute-you-marine-corporal-jesse-w-stites/