The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Indo-European*dʰeh₁-
- Proto-Indo-European*h₁weydʰh₁-
- Proto-Celtic*weidus
- Proto-Celtic*weidelos
- Proto-Brythonic*guɨðel
- Proto-Brythonic*Guɨðe
- Old IrishGoídel
- IrishGae
- EnglishGael
- English todayGaelic
Etymology from Wiktionary, CC BY-SA 4.0.