"am not I?"
Is that even kosher? What about 'am I not'? Yes, this is a different issue. But what I am taking issue with is that the contraction "amn't" comes from something that sounds
wrong, wrong, wrong! "Am not I"?? I ask you!

I think what you're trying to convey by subtle signs is that you personally pronounce an R in aren't I?. Aren't you?
Ms. Subtlety, that's me! Yes, I say arrrrrrren't. But I take issue with your examples of similarities! Aunt does rhyme with can't--but I want you to understand that the
correct sound is the same a-sound as in flack, not
flock! Though there are some US'ns who use that sound, notably Will Smith in Men In Black, when he said, "Oh, was that your Ontie?".[poking the borax e]