Hjǫrdís (Old Norse) comes from Old Norse hjǫrr, from Proto-Germanic heruz, from Proto-Indo-European ḱérus, from Proto-Indo-European (s)ker-, from Proto-Indo-European sek- — to cut, cut off, sever.
Ancestry of “Hjǫrdís”, step by step
Hjǫrdís traces back through two separate lines of ancestry.