Where does “Ольга” come from?

Ольга (Russian) comes from Old East Slavic Ольга, from Old Norse heilagr, from Proto-Germanic hailagaz, from Proto-Germanic hailaz, from Proto-Indo-European *kéh₂ilos.

Ancestry of “Ольга”, step by step

Step	Language	Word	Meaning
1	Old East Slavic	Ольга	—
2	Old Norse	heilagr	holy; inviolable, sacred
3	Proto-Germanic	hailagaz	holy, sacred
4	Proto-Germanic	hailaz	whole, unbroken, intact; entire, complete; hale,...
5	Proto-Indo-European	*kéh₂ilos	—

Words derived from “Ольга”

Olga
Olga
Olga
Olga
Oili
Olga
Olga
Olita
Olga
Olga
Olga
Olga
Olga
Oľga
Olga
Ååʹlga

Every word from Proto-Indo-European *kéh₂ilos →

Ольга — Etymology, Origin & Word History | Etymology Explorer