1) His Roman name is Mars, which is where we name the planet after.
2) He was in love with Aphrodite/Venus
3) God of war/blood lust/slaughter
4) In some Greek versions he is the rejected son of Zeus and Hera. Hera conceived Ares using a magical herb to get revenge in Zeus for having many love affairs.
5) He had his two sons Phobos and Deimos ride with him in battle. Phobos and Deimos are also the names of Mars' moons.