I got a question: now there are ally and hero cardswith the same name and unique logo. You can never play a unique card when there is already in play among you or he other players, but when you play a unique ally and there is a hero with the same name in play? Its not the same card but only the same name. So the question is: can i play a same named ally card when there is a hero with the same name in play?

rulebook page 8:

And it is also said in the rulebook from the hobbit (for Beorn for example)