Perseus

  Perseus was the first person who defeated Medusa.  He was the son of  Zeus and  mortal Danae.  His siblings are Ares, Apollo, Athena, Dionysus, Hermes, Aphrodite, Heracles, Artemis, Hephaestus those are all the ones that  I know. 

He saved Andromeda form the sea of monster Cetus.Some of his children  are Perseas, Gorgophone, Heleus, and Electryon. Perseus married Andromeda. After he slayed the monster setting her free  and when he was done he claimed her for marriage. When Perseus cut off Medusa head a Pegasus flew off from her neck. Two gorgons pursued him, but he escaped.