From Egyptian jtn meaning “solar disk”. Aton was an Egyptian god of the sun, depicted as a solar disk with long rays extending downwards. The worship of Aton was especially extensive during the reign of the pharaoh Akhenaton, who proclaimed Aton was the only god.
Possibly means “enduring” from Greek τλάω (tlao) meaning “to endure”. In Greek mythology he was a Titan punished by Zeus by being forced to support the heavens on his shoulders.