Gregorovius rests the probability that she was beautiful upon the known characteristics and fastidious tastes of the cardinal.

Since it is unthinkable that such a man would have been captivated by an ugly woman or would have been held by a stupid one, it is fairly reasonable to conclude that she was beautiful and ready-witted.
All that we do know of her up to the time of her liaison with Cardinal Roderigo is that she was born on July 13, 1442, this fact being ascertainable by a simple calculation from the elements afforded by the inscription on her tomb in Santa Maria del Popolo: Vix ann.

LXXVI m.

IV d.

XII Objit anno MDXVIII XXVI, Nov.
And again, just as we know nothing of her family origin, neither have we any evidence of what her circumstances were when she caught the magnetic eye of Cardinal Roderigo de Lanzol y Borja--or Borgia as by now his name, which had undergone italianization, was more generally spelled.
Infessura states in his diaries that Roderigo desiring later--as Pope Alexander VI--to create cardinal his son by her, Cesare Borgia, he caused false witness to be borne to the fact that Cesare was the legitimate son of one Domenico d'Arignano, to whom he, the Pope, had in fact married her.