Sorry, I just can't take this name seriously. The Finnish word for 'ass' is 'perse', and this name cracks me up for that reason. Besides, it is quite a pompous name to use on a child, isn't it?
I love this name! I named my iPod after it. Perseus was a great hero who not only slayed Medusa, but saved the princess Andromeda from a sea monster. Her parents had chained her to a rock in the ocean for a sacrifice and Perseus, who was flying over, froze the sea monster with Medusa's head.
I liked the Greek myth, but the name itself isn't all that pleasant. The meaning isn't exactly great, and it sounds close to the snobby-sounding Percy.
In Greek mythology Perseus was the only hero to have a happy ending. I love some of the other hero's names', but for a namesake to have had a happy ending swings this name for me. I would seriously consider it in my top ten boys names.