[Lindolirian]

I agree i remember it saying that he was a Black Numenorean which meant that he was once just like three of the Nazgul who were Black Numenoreans as well. For whatever reason, Sauron didn't feel like making a tenth ring so while the Ringwraiths "died" and grew more invisible and more enslaved to Sauron, he studied sorcerous arts and grew in the favor of Sauron as it says in the books. Now to be old enough to not even remember his name means that he was eitherto pre-occupied with Sauron's buisiness or he's an idiot. I mean Gandalf was WAY older than this dude and he still remembered his name was Olorin in the days of his youth. So the Mouth of Sauron used his sorcerous ways to live really long and he forgot his name.......