Help on a Hamlet Research Paper! Thanks and +k

I need to relate the character's in Hamlet: (Hamlet, Claudius, Horatio and Fortinbras) to actual historic figures before or around the time of shakepseare. I have searched for hours and have found nothing great, just authorship questions concerning Hamlet. Either i suck at the internet or somethings up. So any help is greatly appreciated, just pointing me in the right direction with the name of a well known historic figure would be great! Thanks a ton!