Where does “quatro” come from?
quatro (Old Spanish) comes 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.
Ancestry of “quatro”, step by step
Words derived from “quatro”