Where does “galgi” come from?

galgi (Old Norse) comes from Proto-Germanic galgô, from Proto-Indo-European ǵʰAlgʰ-.

galgi (Old Norse): cross-beam, gallows

Definitions

Step	Language	Word	Meaning
1	Proto-Germanic	galgô	a rod, pole, stake; a beam, cross-beam, rafter; a...
2	Proto-Indo-European	ǵʰAlgʰ-	—

galgi — Etymology, Origin & Word History | Etymology Explorer