Where does “hēl” come from?

hēl (Old Dutch) comes from Proto-West Germanic hail, from Proto-Germanic hailaz, from Proto-Indo-European *kéh₂ilos.

Ancestry of “hēl”, step by step

Step	Language	Word	Meaning
1	Proto-West Germanic	hail	healthy, sound; whole; omen, portent
2	Proto-Germanic	hailaz	whole, unbroken, intact; entire, complete; hale,...
3	Proto-Indo-European	*kéh₂ilos	—

hēl — Etymology, Origin & Word History | Etymology Explorer