Where does “λύττα” come from?

λύττα (Ancient Greek) comes from Ancient Greek λύσσα, from Proto-Indo-European wĺ̥kʷos — wolf.

Ancestry of “λύττα”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	λύσσα	rage, fury; mania, raging madness; rabies
2	Proto-Indo-European	wĺ̥kʷos	wolf