Where does “Катенька” come from?

Катенька (Russian) comes from Russian Ка́тя, from Russian Екатери́на, from Ancient Greek Αἰκατερίνη, from Ancient Greek Ἑκάτη, from Ancient Greek ἑκάς, from Ancient Greek ἕ, from Proto-Hellenic hwe, from Proto-Indo-European swé — self.

Ancestry of “Катенька”, step by step

StepLanguageWordMeaning
1RussianКа́тяKatya
2RussianЕкатери́наCatherine; {{w|Catherine the Great}}; Katherine
3Ancient GreekΑἰκατερίνη
4Ancient GreekἙκάτηHecate
5Ancient Greekἑκάςafar, far off; long after
6Ancient Greekhim
7Proto-Hellenichwe
8Proto-Indo-Europeanswéself
Every word from Proto-Indo-European swéEvery word from Proto-Hellenic hweEvery word from Ancient Greek