Where does “dau ddeg pedair” come from?

dau ddeg pedair (Welsh) comes from Welsh pedair, from Proto-Celtic kʷetesres, from Proto-Indo-European kʷétesres, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

Ancestry of “dau ddeg pedair”, step by step

dau ddeg pedair traces back through 3 separate lines of ancestry.

via Welsh pedair

StepLanguageWordMeaning
1Welshpedairfeminine of pedwar; four
2Proto-Celtickʷetesres—
3Proto-Indo-Europeankʷétesresfeminine nominative/vocative of *kʷetwóres
4Proto-Indo-Europeankʷetwóresfour
5Proto-Indo-Europeankʷe-and

via Welsh dau

StepLanguageWordMeaning
1Welshdautwo
2Proto-Brythonic*dowtwo
3Proto-Celtic*duwotwo
4Proto-Indo-Europeandwóh₁two

via Welsh deg

StepLanguageWordMeaning
1Welshdegten; Soft mutation of teg
2Proto-Brythonicdegten
3Proto-Celticdekamten
4Proto-Indo-Europeandéḱm̥ten
Every word from Proto-Indo-European kʷe- →