Where does “Bélgica” come from?

Bélgica (Portuguese) comes from French belgique, from Latin Gallia Belgica, 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 “Bélgica”, step by step

StepLanguageWordMeaning
1FrenchbelgiqueBelgian
2LatinGallia Belgica
3LatinGalliaGaul, modern-day France; France
4Latin-iaUsed to form a feminine abstract noun, usually...
5Latin-iusforming adjectives from nouns; nominative neuter...
6Proto-Italic-jōsForms comparative adjectives
7Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yós