Where does “quadruplo” come from?

quadruplo (Latin) comes from Latin quadruplus, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto, from Latin quārtus, from Proto-Indo-European kʷeturtos, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

quadruplo (Latin): I quadruple, multiply by four, make fourfold