There were, at one time, more than just 13 Forsaken. But they were killed in the War of Power.
In Chapter 25 of A Crown of Swords ("Mindtrap") on page 419 Moghedien was talking to Moridin of the True Power. saying "Only twenty-nine others have ever been granted--"
Let’s do some math, shall we? Assuming all thirteen Dreadlords from the Trolloc Wars could touch the True Power, and taking in the thirteen Forsaken. That leaves three people unaccounted for. Even if you throw in the Dark One, that’s still two others that could. Trying to say the Creator is another is pushing it, but that still leaves one other person. But my guess is that the DO and Creator aren’t counted.
So, who are these ? And why does no one seem to care about them? If they were a part of the War of Power during the Age of Legends, isn’t there some extremely fragmented record that mentions a Forsaken other than the common thirteen?
wotmania says: I am not sure where you found that there were only thirteen Dreadlords during the Trolloc Wars. I do not think Jordan ever stated an exact number, but I would guess there were a lot more than thirteen... Just because someone could touch the True Power does not mean they were one of the Forsaken. I think Moghedien’s comment was just to point out that to touch the True Power is a rare privilege, handed out to only the Great Lord’s most favored servants.

Dead