Where does “drie” come from?

drie (Middle Low German) comes from Old Saxon thrie, from Proto-West Germanic þrīʀ, from Proto-Germanic þrīz, from Proto-Indo-European *tréyes.

Ancestry of “drie”, step by step

StepLanguageWordMeaning
1Old Saxonthriethree
2Proto-West Germanicþrīʀthree
3Proto-Germanicþrīzthree
4Proto-Indo-European*tréyes—
Every word from Proto-Indo-European *tréyes →Every word from Proto-Germanic þrīz →Every word from Proto-West Germanic þrīʀ →