Where does “vier” come from?

vier (Old Dutch) comes from Proto-West Germanic feuwar, from Proto-Germanic fedwōr, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

Ancestry of “vier”, step by step

StepLanguageWordMeaning
1Proto-West Germanicfeuwarfour
2Proto-Germanicfedwōrfour
3Proto-Indo-Europeankʷetwóresfour
4Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe- →Every word from Proto-Indo-European kʷetwóres →Every word from Proto-Germanic fedwōr →