Where does “Gallia Belgica” come from?

Gallia Belgica (Latin) comes from Latin Gallia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Gallia Belgica”, step by step

Gallia Belgica traces back through two separate lines of ancestry.

via Latin Gallia

StepLanguageWordMeaning
1LatinGalliaGaul, modern-day France; France
2Latin-iaUsed to form a feminine abstract noun, usually...
3Latin-iusforming adjectives from nouns; nominative neuter...
4Proto-Italic-jōsForms comparative adjectives
5Proto-Indo-European-yósCreates adjectives from noun or verb stems

via Latin Belgica

StepLanguageWordMeaning
1LatinBelgica
2LatinbelgicusBelgic
3LatinBelgaethe Belgians; Belgians
4Proto-Celticbolg-to swell
5Proto-Indo-Europeanbʰelgʰ-to bulge, swell

Words derived from “Gallia Belgica

Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius