Probably my mom. A while back she sent my wife a copy of the WT article in the mail about 607 BCE (addressed to my wife since she's only faded, not DF'd like me - apparently good ol' Mom might jeopardize her everlasting life ™ if she wrote her own son's name on the envelope) since she knows that's one of the things that "stumbled" me.
I used to hear various witnesses say that 90% of DF'd witnesses come back. I specifically remember the 90% figure used. I wonder where they got it from or if they just made it up. I don't think it's ever been in print, and I doubt it's true, although just based on my own personal experience it seemed like people were always getting reinstated and at any given time there were always a couple of DF'd people at my hall who attended.