Where does “Hilja” come from?

Hilja (Finnish) comes from Latin Placidus, from Latin -idus, from Proto-Italic *-iðos.

Ancestry of “Hilja”, step by step

Step	Language	Word	Meaning
1	Latin	Placidus	—
2	Latin	-idus	tending to
3	Proto-Italic	*-iðos	—

Hilja — Etymology, Origin & Word History | Etymology Explorer