The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Indo-European*dʰeh₁-
- Proto-Indo-European*h₁weydʰh₁-
- Proto-Indo-European*(h₁)wéydʰ(h₁)us
- Proto-Germanic*widuz
- Proto-West Germanic*widu
- Frankish*Widō
- Medieval Latin*Widō
- ItalianGuido
- English todayguido
From Italian Guido, a male given name. Doublet of Guido, Guy, and guy.
Etymology from Wiktionary, CC BY-SA 4.0.