Thank you, that's a very good start. That woman was lying when she blamed purebloods, then, there's no Riddle family of any note whatsoever.
I have sufficient knowledge about this place to make sense of it, I think, so don't fret about the practicalities. This Tom Riddle, do you know where he lived, or if he attended Hogwarts, or - well, anything that would aid me in locating him before he has the opportunity to cause any trouble.