Where does “tro” come from?

tro (Old Danish) comes from Old Norse trú, from Middle Low German truwe, from Old Saxon treuwa, from Proto-Germanic trewwō, from Proto-Indo-European drewo-.

Ancestry of “tro”, step by step

StepLanguageWordMeaning
1Old Norsetrúfaith; inflection of trúr: ## positive degree...
2Middle Low Germantruwe—
3Old Saxontreuwa—
4Proto-Germanictrewwōfidelity, pledge
5Proto-Indo-Europeandrewo-—

Words derived from “tro”

Every word from Proto-Indo-European drewo- →Every word from Proto-Germanic trewwō →Every word from Old Saxon treuwa →