Where does “Ἑκατερίνη” come from?

Ἑκατερίνη (Ancient Greek) comes from Ancient Greek ἑκάτερος, from Ancient Greek -τερος, from Proto-Indo-European -teros — Contrastive or oppositional adjectival suffix.

Ancestry of “Ἑκατερίνη”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἑκάτερος	each of two, each singly
2	Ancient Greek	-τερος	Used on adjectives that express some notion of...
3	Proto-Indo-European	-teros	Contrastive or oppositional adjectival suffix

Every word from Proto-Indo-European -teros →Every word from Ancient Greek -τερος →Every word from Ancient Greek ἑκάτερος →