Where does “Muir Rua” come from?

Muir Rua (Irish) comes from English Red Sea, from Middle English Red See, from Old English Rēad Sǣ, from Latin Mare Rubrum, from Ancient Greek Ἐρυθρᾱ̀ θάλασσα — Indian Ocean.

Ancestry of “Muir Rua”, step by step

Muir Rua traces back through 3 separate lines of ancestry.

via English Red Sea

StepLanguageWordMeaning
1EnglishRed SeaThe states of the western and southern United States which consistently vote Republican in presidential elections
2Middle EnglishRed See
3Old EnglishRēad Sǣ
4LatinMare Rubrumthe Red Sea
5Ancient GreekἘρυθρᾱ̀ θάλασσαIndian Ocean

via Irish muir

StepLanguageWordMeaning
1Irishmuirsea; mare
2Old Irishmuirsea
3Proto-Celticmorisea
4Proto-Indo-Europeanmórisea; standing water
5Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland

via Irish rua

StepLanguageWordMeaning
1Irishruared; reddish-brown, russet, copper brown; wild,...
2Old Irishrúadred, reddish
3Proto-Celticroudosred
4Proto-Indo-Europeanh₁rewdʰ-red
Every word from Ancient Greek Ἐρυθρᾱ̀ θάλασσα
Muir Rua — Etymology, Origin & Word History | Etymology Explorer