Where does “rhafnwydden y môr” come from?

rhafnwydden y môr (Welsh) comes from Welsh rhafnwydd, from Welsh gwŷdd, from Middle Welsh gwyð, from Proto-Brythonic *gwuɨð, from Proto-Celtic *weidus, from Proto-Indo-European h₁weydʰh₁-, from Proto-Indo-European dwi-, from Proto-Indo-European dwóh₁ — two.

Ancestry of “rhafnwydden y môr”, step by step

rhafnwydden y môr traces back through 3 separate lines of ancestry.

via Welsh rhafnwydd

StepLanguageWordMeaning
1Welshrhafnwyddbuckthorn (Rhamnaceae), especially genus Rhamnus
2Welshgwŷddloom; trees; plough
3Middle Welshgwyð—
4Proto-Brythonic*gwuɨðappearance, presence, face, sight, image
5Proto-Celtic*weiduswild
6Proto-Indo-Europeanh₁weydʰh₁-to separate, divide
7Proto-Indo-Europeandwi-two; apart, asunder
8Proto-Indo-Europeandwóh₁two

via Welsh y

StepLanguageWordMeaning
1Welshythe; that; which, whom
2Middle Welshyhis, its with reference to a masculine noun; triggers soft mutation of following consonant
3Old Welshirthe
4Proto-Celticsindosthis
5Proto-Indo-Europeansḗmone
6Proto-Indo-Europeansem-together, one

via Welsh môr

StepLanguageWordMeaning
1Welshmôrsea, ocean, the deep; plenty, abundance,...
2Proto-Brythonicmọrgreat, large
3Proto-Celticmorisea
4Proto-Indo-Europeanmórisea; standing water
5Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland
Every word from Proto-Indo-European dwóh₁ →