I think what you're implying is "Rosemary's Baby" territory. Or to be more precise "Martha Jason's baby".High Lord Tolkien wrote:What about a son?
The only reason i think it's possible is that SRD has already said that Foul can pass between worlds or influence others in the real world (Joan maybe Roger too?).
If Jeremiah was just a few years old at the beginning of the second Chronicles then he was born at roughly the time of the Sunbane's dominance.
In Fatal Revenant is says that she had three children, Jeremiah being the eldest, before she even entered the Community of Retribution.
I don't even beleive Lord Foul has a nob. Aren't the Jeherrin proof of this - beings created in a vat or a kiln. If Foul does have a nob he has had thousands of years in which to create lots of "little Fouls", which would be far more dangerous and harmful to the Land than his Ravers could ever be.