Where does “Penrhyndeudraeth” come from?

Penrhyndeudraeth (Welsh) comes from Welsh dau, from Proto-Brythonic *dow, from Proto-Celtic *duwo, from Proto-Indo-European dwóh₁ — two.

Ancestry of “Penrhyndeudraeth”, step by step

Penrhyndeudraeth traces back through 3 separate lines of ancestry.

via Welsh dau

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

via Welsh penrhyn

StepLanguageWordMeaning
1Welshpenrhyncape, promontory; peninsula; isthmus
2Welshpenhead; chief; top, apex
3Proto-Brythonicpennhead
4Proto-Celtickʷennomhead

via Welsh traeth

StepLanguageWordMeaning
1Welshtraethbeach, coast
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Celtic *duwo →Every word from Proto-Brythonic *dow →