Where does “Albi” come from?

Albi (French) comes from Latin Albius, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Albi”, step by step

Step	Language	Word	Meaning
1	Latin	Albius	a Roman nomen gentile, gens or "family name" famously held by
2	Latin	-ius	forming adjectives from nouns; nominative neuter...
3	Proto-Italic	-jōs	Forms comparative adjectives
4	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Words derived from “Albi”

Albigenses
Albigensian
Albigensianism

Every word from Proto-Indo-European -yós →Every word from Latin -ius →Every word from Proto-Italic -jōs →