Where does “þriðing” come from?

þriðing (Old English) comes from Old Norse þriðjungr, from Proto-Germanic þridjô, from Proto-Indo-European tretyós, from Proto-Indo-European tr̥tyós, from Proto-Indo-European tréyes — three.

Ancestry of “þriðing”, step by step

StepLanguageWordMeaning
1Old Norseþriðjungrthird part
2Proto-Germanicþridjôthird
3Proto-Indo-Europeantretyós—
4Proto-Indo-Europeantr̥tyósthird
5Proto-Indo-Europeantréyesthree

Words derived from “þriðing”

Every word from Proto-Indo-European tréyes →Every word from Proto-Indo-European tr̥tyós →Every word from Proto-Indo-European tretyós →