Where does “treuwa” come from?

treuwa (Frankish) comes from Proto-Germanic trewwō, from Proto-Indo-European drewo-.

Ancestry of “treuwa”, step by step

StepLanguageWordMeaning
1Proto-Germanictrewwōfidelity, pledge
2Proto-Indo-Europeandrewo-—
Every word from Proto-Indo-European drewo- →Every word from Proto-Germanic trewwō →