Where does “national-” come from?

national- (Swedish) comes from Latin nationalis, from Latin nātiō, from Latin nātus, from Latin gnātus, from Proto-Italic gnātos, from Proto-Indo-European ǵn̥h₁tós, from Proto-Indo-European ǵenh₁- — to produce, to beget, to give birth.

national- (Swedish): national