Where does “Norþweġ” come from?

Norþweġ (Old English) comes from Old Norse Norðvegr, from Old Norse norðr, from Proto-Germanic nurþrą, from Proto-Germanic nurþraz, from Proto-Indo-European *nér — below the surface, below.

Ancestry of “Norþweġ”, step by step

StepLanguageWordMeaning
1Old NorseNorðvegr—
2Old Norsenorðrnorth; north, northward
3Proto-Germanicnurþrąnorth, northern; north, northward
4Proto-Germanicnurþraznorth, northern
5Proto-Indo-European*nérbelow the surface, below
Every word from Proto-Indo-European *nér →Every word from Proto-Germanic nurþraz →Every word from Proto-Germanic nurþrą →