Where does “селёдочный” come from?

селёдочный (Russian) comes from Russian селёдка, from Russian сельдь, from Old East Slavic сельдь, from Old East Slavic сьлдь, from Old Norse síld, from Proto-Germanic sīlą — a kind of fish; a launce, sand eel; a herring.

селёдочный (Russian): herring

Definitions

herring

Ancestry of “селёдочный”, step by step

Step	Language	Word	Meaning
1	Russian	селёдка	herring (Clupea)
2	Russian	сельдь	herring
3	Old East Slavic	сельдь	—
4	Old East Slavic	сьлдь	—
5	Old Norse	síld	herring
6	Proto-Germanic	sīlą	a kind of fish; a launce, sand eel; a herring

Every word from Proto-Germanic sīlą →Every word from Old Norse síld →Every word from Old East Slavic сьлдь →