Where does “*Marnardalr” come from?

*Marnardalr (Old Norse) comes from Old Norse dalr, from Proto-Germanic dalą, from Proto-Indo-European dʰel- — an arch, vaulting, curve, curvature, cavity;...

Ancestry of “*Marnardalr”, step by step

*Marnardalr traces back through two separate lines of ancestry.

via Old Norse dalr

StepLanguageWordMeaning
1Old Norsedalrdale, valley
2Proto-Germanicdaląvalley, dale
3Proto-Indo-Europeandʰel-an arch, vaulting, curve, curvature, cavity;...

via Old Norse *Mǫrn

StepLanguageWordMeaning
1Old Norse*Mǫrn
Every word from Proto-Indo-European dʰel-Every word from Proto-Germanic daląEvery word from Old Norse dalr