Peter Paul Rubens [Public domain], via Wikimedia Commons

From The Planet Mars by E.M. Antoniadi

"The Greeks called it Ares (Mars), 4 name of the God of War, and 
apparently it was also known sometimes as Hercules.* Moreover, it 
was regarded as fiery 8 and impetuous. 1 Proclus Diadochus called it 
'celestial fire', and added that it symbolised fire."