Granting that, whether original righteousness is called natural or supernatural matters less, if it is God's free gift
Once it is granted that God cannot create man without righteousness and holiness, the other question does not seem so important: whether the righteousness and holiness in which God made the first man, and without which God could not have created him, belongs to the endowments of nature or of grace, and should be called natural or supernatural. That holds provided we affirm, as everyone grants, that it is God's free gift, owed to no merit of the creature.
Latin
LI. Hoc autem semel concesso, fieri non posse ut homo a Deo creetur absque justitia & sanctitate, tanti momenti non videtur altera illa quaestio. An Justitia & Sanctitas illa in qua Deus primum hominem condidit, & sine qua creari a Deo non potuit, pertineat ad naturae, vel ad gratiae dotes, & naturalis dicenda sit, vel supernaturalis: Modo, quod omnes concedunt, statuamus illam esse gratuitum Dei donum, quod nullis creaturae meritis debebatur.