Where does “himæl” come from?

himæl (Old Danish) comes from Old Norse himinn, from Proto-Germanic himinaz — cloud cover; sky.

Ancestry of “himæl”, step by step

Step	Language	Word	Meaning
1	Old Norse	himinn	the heavens, sky; heaven, paradise
2	Proto-Germanic	himinaz	cloud cover; sky

himæl — Etymology, Origin & Word History | Etymology Explorer