How to find a person from his picture? am having a picture of a model but I dont no his name and de?

Oddly enough, http://images.google.com/ upload your picture that you have and you can search over google to see if he has posted anywhere online that specific picture or if anyone has of him. This goes for any picture actually even a drawing that you have or a pic that you found that you don't know where it came from originally. This also helps is variations of the pictures as well, event he same person just different poses or colors.