Where does “duas” come from?

duas (Old Portuguese) comes from Latin duō, from Proto-Italic duō, from Proto-Indo-European dwóh₁ — two.

Ancestry of “duas”, step by step

StepLanguageWordMeaning
1Latinduōtwo; 2
2Proto-Italicduōtwo
3Proto-Indo-Europeandwóh₁two

Words derived from “duas”

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Italic duō →Every word from Latin duō →