Where does “Абаддон” come from?

Абаддон (Russian) comes from Hebrew אבדון, from Hebrew א־ב־ד — Forming words pertaining to loss.

Ancestry of “Абаддон”, step by step

Step	Language	Word	Meaning
1	Hebrew	אבדון	destruction, devastation, ruin, doom
2	Hebrew	א־ב־ד	Forming words pertaining to loss

Абаддон — Etymology, Origin & Word History | Etymology Explorer