Where does “ἀλέτρι” come from?

ἀλέτρι (Byzantine Greek) comes from Ancient Greek ἀλότρι.

Ancestry of “ἀλέτρι”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἀλότρι	—

ἀλέτρι — Etymology, Origin & Word History | Etymology Explorer