Where does “Hallgeirr” come from?

Hallgeirr (Old Norse) comes from Old Norse geirr, from Proto-Germanic gaizaz, from Proto-Indo-European ǵʰoysós, from Proto-Indo-European ǵʰey- — winter.

Ancestry of “Hallgeirr”, step by step

Hallgeirr traces back through two separate lines of ancestry.

via Old Norse geirr

StepLanguageWordMeaning
1Old Norsegeirrspear
2Proto-Germanicgaizazspear, pike, javelin
3Proto-Indo-Europeanǵʰoysósthrowing spear
4Proto-Indo-Europeanǵʰey-winter

via Old Norse hallr

StepLanguageWordMeaning
1Old Norsehallrslope, hill; rock, stone; leaning to one side,...
2Proto-GermanichalluzA rock; stone; boulder; A rockface; cliff
3Proto-Indo-European(s)kel-to bend, crook; bent, crooked; leg, heel, knee,...
Every word from Proto-Indo-European ǵʰey-Every word from Proto-Indo-European ǵʰoysósEvery word from Proto-Germanic gaizaz