Where does “thrī” come from?

thrī (Old Dutch) comes from Proto-Germanic þrīz, from Proto-Indo-European *tréyes.

Ancestry of “thrī”, step by step

StepLanguageWordMeaning
1Proto-Germanicþrīzthree
2Proto-Indo-European*tréyes—

Words derived from “thrī”

Every word from Proto-Indo-European *tréyes →Every word from Proto-Germanic þrīz →