Why does anyone even care? And what difference could it possibly make? A child is a child in its own unique right, and there's no way of predicting what strengths and weaknesses of character will develop in that child, no matter who the father was.

One thing for sure, we know exactly who the mother was, and that's why I think they had it right in the few ancient societies where family line and family name were brought down through the mothers, not the fathers. That's the sensible way to do it, because the identity of the mother is never in doubt. The father could be just about anyone, after all!