User blog:DanyD/Ezio's Third Child?

I know Ezio Auditore had two children with Sofia Sartor, and they are Flavia and Marcello.

So I was looking on Clay Kaczmarek's profile on the Wiki, and I go on the Ancestry section where I find this:

His Auditore bloodline ended with Ezio Auditore da Firenze, as Clay's next ancestor was an illegitimate child.

I don't know if I'm looking at this in the right way, I don't know if this is a mistake, I don't know if this is old news now, but what I'm getting from this that Ezio has a anonymus third child! I mean it's not that surprising seeing as he had many love interest like Christina, Caterina and possibly Rosa. Even one of the courtesans that Ezio hired could be the mother of the Anon Child, but if it's true then why is this the only place I have heard it been mentioned?

please elucidate me on this matter if I am wrong.