The story
- Proto-Indo-European*bʰelǵʰ-?
- Proto-Celtic*belgos
- LatinBelgae
- Latinbelgicus
- LatinGallus
- LatinGallia
- LatinBelgica
- LatinGallia Belgicaellip.
- LatinBelgica
- Frenchbelgicisme
- English todayBelgicism
Semi-learned borrowing from French belgicisme. By surface analysis, Belgica + -ism. Named after Belgium.
Etymology from Wiktionary, CC BY-SA 4.0.