Where does “deulawr” come from?

deulawr (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.

deulawr (Welsh): two-storey, double-decker

Definitions

  1. two-storey, double-decker

Ancestry of “deulawr”, step by step

deulawr 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 llawr

StepLanguageWordMeaning
1Welshllawrfloor, ground; earth; storey
2Proto-Brythonicllọrfloor
3Proto-Celticɸlāromfloor
4Proto-Indo-Europeanpleh₂rosflat; floor
5Proto-Indo-Europeanpleh₂-flat
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Celtic *duwo →Every word from Proto-Brythonic *dow →
deulawr — Etymology, Origin & Word History | Etymology Explorer