Who is hercules?is he the son of Zeus as well?is he related to perseus?

Yes, they are related because they are children of Zeus. By the way, is Heracles, not Hercules, he was born from an adventure of Zeus with the mortal Alcmena, and he is one of the greatest mythological heroes. Perseus was born from another ual adventure, but with the princess Dana� this time. Her father, Acrisius, had confine in a cell so that she did not have children. I think that makes half-cousin...