In Greek mythology, the sun was personified as Helios. He was regarded brother of the goddesses Selene, the moon, and Eos, the dawn. The names of these three were also the common Greek words for sun, moon and dawn.

Helios was imagined as a handsome god crowned with the shining aureole of the sun, who drove the chariot of the sun across the sky each day.

Later on Helios was more often identified with the god of light, Apollo. (However, they are not the same god!).
The equivalent of Helios in Roman mythology was Sol or even better said: Sol Invictus.

As usual – I did draw him the way I do see him. The rock formation you can see in the back is a place where I often find myself – when working as an energy healer with the energy of the Sungod Helios.

Faber-Castell Watercolour-Pencils “Albrecht Dürer”
watercolour paper 300g/m²