Where does “Alfr” come from?

Alfr (Old Norse) comes from Proto-Germanic albiz, from Proto-Indo-European albʰós — white.

Ancestry of “Alfr”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	albiz	elf, fairy
2	Proto-Indo-European	albʰós	white

Alfr — Etymology, Origin & Word History | Etymology Explorer