Where does “vaalioikeus” come from?

vaalioikeus (Finnish) comes from Finnish vaali, from Swedish väl, from Old Swedish hval, from Old Norse hvalr, from Proto-Germanic hwalaz, from Proto-Indo-European (s)kʷálos — large fish; sheatfish.

Ancestry of “vaalioikeus”, step by step

vaalioikeus traces back through two separate lines of ancestry.

via Finnish vaali

Step	Language	Word	Meaning
1	Finnish	vaali	election; Third-person singular indicative past...
2	Swedish	väl	well; accurately, completely, to a significant...
3	Old Swedish	hval	whale
4	Old Norse	hvalr	whale
5	Proto-Germanic	hwalaz	whale, sheatfish
6	Proto-Indo-European	(s)kʷálos	large fish; sheatfish

via Finnish oikeus

Step	Language	Word	Meaning
1	Finnish	oikeus	right; law; justice, law
2	Finnish	oikea	right; right, correct; appropriate, proper,...
3	Proto-Finnic	oikeda	straight; right, correct
4	Proto-Finno-Permic	wojketa	—

Every word from Proto-Indo-European (s)kʷálos →Every word from Proto-Germanic hwalaz →Every word from Old Norse hvalr →