Where does “Treu” come from?

Treu (English) comes from German treu, from Middle High German triuwe, from Old High German triuwa, from Proto-West Germanic treuwu, from Proto-Germanic trewwō, from Proto-Indo-European drewo-.

Ancestry of “Treu”, step by step

StepLanguageWordMeaning
1Germantreuloyal; faithful; true
2Middle High Germantriuweloyalty, reliability, truthfulness
3Old High Germantriuwafaithfulness, loyalty, truth; contract, pact,...
4Proto-West Germanictreuwufidelity, pledge
5Proto-Germanictrewwōfidelity, pledge
6Proto-Indo-Europeandrewo-—
Every word from Proto-Indo-European drewo- →Every word from Proto-Germanic trewwō →Every word from Proto-West Germanic treuwu →