I am the son of Iapetus and brother of Prometheus and Atlas husband of Pandora. My name is Greek for hindsight. Who am I?

You are Epimetheus, a figure in Greek mythology known for being the brother of Prometheus and Atlas. The name Epimetheus translates to "afterthought," which aligns with the clue about hindsight. He is often associated with the creation of mankind and the gifts given to them, including his wife, Pandora.