*Hallvǫrðr (Old Norse) comes from Old Norse vǫrðr, from Proto-Germanic *warduz, from Proto-Indo-European wēr-, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.
Ancestry of “*Hallvǫrðr”, step by step
*Hallvǫrðr traces back through two separate lines of ancestry.