Where does “heiði” come from?

heiði (Icelandic) comes from Old Norse heiðr, from Proto-Germanic haiþī, from Proto-Indo-European ḱayt- — forest, wasteland, pasture.

heiði (Icelandic): heath

Definitions

Step	Language	Word	Meaning
1	Old Norse	heiðr	honour, honor, worth; heath, moor; bright, clear,...
2	Proto-Germanic	haiþī	heath, wasteland
3	Proto-Indo-European	ḱayt-	forest, wasteland, pasture

heiði — Etymology, Origin & Word History | Etymology Explorer