Where does “Novum Belgium” come from?

Novum Belgium (Latin) 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 “Novum Belgium”, step by step

Novum Belgium traces back through two separate lines of ancestry.

via Latin Belgium

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

via Latin novum

Step	Language	Word	Meaning
1	Latin	novum	neuter nominative singular of novus; masculine...
2	Latin	novus	new, novel; fresh, young; recent
3	Proto-Italic	nowos	new
4	Proto-Indo-European	*néwos	—

Every word from Proto-Indo-European bʰelgʰ- →Every word from Proto-Celtic bolg- →Every word from Latin Belgae →