Where does “Alþjófr” come from?

Alþjófr (Old Norse) comes from Old Norse al-, from Old Norse allr, from Proto-Germanic allaz, from Proto-Indo-European h₂él-.

Ancestry of “Alþjófr”, step by step

Step	Language	Word	Meaning
1	Old Norse	al-	all, very, totally; universal, general
2	Old Norse	allr	all, entire, whole; all, quite, entirely; gone,...
3	Proto-Germanic	allaz	all
4	Proto-Indo-European	h₂él-	—

Alþjófr — Etymology, Origin & Word History | Etymology Explorer