In Roman (PROSE: The Slave War) and Greek mythology, Mars was the god of war. He had two sons, Deimos and Phobos. The planet Mars was named after him, and its two moons, Deimos and Phobos, named after his children. (AUDIO: Phobos)
Behind the scenes
Mars is actually the Roman god of war and his sons are Formido/Metus and Pavor/Terror. His Greek equivalent is Ares.