Where does “Belgio” come from?

Belgio (Italian) comes from Latin Belgium, from Latin Belgica, from Latin belgicus, from Latin Belgae, from Proto-Celtic bolg-, from Proto-Indo-European bʰelgʰ- — to bulge, swell.

Ancestry of “Belgio”, step by step

Step	Language	Word	Meaning
1	Latin	Belgium	—
2	Latin	Belgica	—
3	Latin	belgicus	Belgic
4	Latin	Belgae	the Belgians; Belgians
5	Proto-Celtic	bolg-	to swell
6	Proto-Indo-European	bʰelgʰ-	to bulge, swell

Every word from Proto-Indo-European bʰelgʰ- →

Belgio — Etymology, Origin & Word History | Etymology Explorer