Where does “deuben” come from?

deuben (Welsh) comes from Proto-Indo-European deu-, from Middle Welsh deu, from Proto-Brythonic *dow, from Proto-Celtic *duwo, from Proto-Indo-European dwóh₁ — two.

deuben (Welsh): two-headed, double-headed, bicephalous

Definitions

  1. two-headed, double-headed, bicephalous

Ancestry of “deuben”, step by step

deuben traces back through two separate lines of ancestry.

via Proto-Indo-European deu-

StepLanguageWordMeaning
1Proto-Indo-Europeandeu-lack, fail; to injure, destroy, burn; to do,...
2Middle Welshdeutwo
3Proto-Brythonic*dowtwo
4Proto-Celtic*duwotwo
5Proto-Indo-Europeandwóh₁two

via Welsh pen

StepLanguageWordMeaning
1Welshpenhead; chief; top, apex
2Proto-Brythonicpennhead
3Proto-Celtickʷennomhead
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Celtic *duwo →Every word from Proto-Brythonic *dow →