I'm aware of this quote but I think it's a red herring Martin put in there to lead people astray. Many people have the same name in ASOIF and I'm not really embracing the idea of Bloodraven as 3ER. Martin has flat out stated that Coldhands is not Benjan Stark, but he's going to be someone important.
Unless 3ER is warging into Coldhands somehow.
I'm more of the opinion that 3ER is something different and that Coldhands is Brynden Rivers converted into a White Walker but somehow with the capacity to retain his identity.
OK I understand you now. I think it would be shitty of Martin to somehow not make Bloodraven the Three-Eyed Crow when there are so many hints that he is (which can only be gathered if the reader has read the Dunk and Egg stories):
-His name's Brynden and was in the Night's Watch judging by his tattered clothes
-"How many eyes does Lord Bloodraven have? the riddle ran.
A thousand eyes, and one." - this is what Dunk is thinking during The Mystery Knight. Bloodraven is known for having a thousand eyes, and one. And here's what Leaf says to Bran: "
He has a thousand eyes and one, but there is much to watch. One day you will know."
-He has a winestain birthmark on his neck, as Bloodraven did.
-He has white skin, long white hair and one red eye, as Bloodraven did.
-3EC says he had a brother who he loved (probably Daeron, could be Daemon if GRRM wanted to be a little more tragic), a brother he hated (definitely Bittersteel), and a woman he desired (probably his lover Shiera).
-Leaf says that he has lived past his mortal span, and BR would be 125 years old.
So unless there's another ancient one-eyed albino with a winestain birthmark on his neck named Brynden who used to be in the Night's Watch...that's one hell of a red herring, Taiso! Especially considering some hints aren't in the main series. But I like reading about any ASOIAF theories, no matter how outrageous. I started a re-read in July, and with the new season out it's good to talk about this again with people.