The name "Mars" is the Latinized (Roman) version of the Greek god Ares, the god of war. In Greek mythology, Deimos and Phobos were Ares' sons, who would accompany him onto the battlefield.
The fight between Kratos and Thanatos also involves Deimos, who Kratos saved from falling off a cliff. This fight, which took place in God of War: Ghosts of Sparta, was one of the few where Kratos ...