Where does “Αλβανία” come from?

Αλβανία (Greek) comes from Byzantine Greek Ἀλβανός, from Latin Albānus, from Latin Alba Longa.

Ancestry of “Αλβανία”, step by step

Step	Language	Word	Meaning
1	Byzantine Greek	Ἀλβανός	an inhabitant of Alba
2	Latin	Albānus	—
3	Latin	Alba Longa	—

Αλβανία — Etymology, Origin & Word History | Etymology Explorer