Where does “Aostatalerin” come from?

Aostatalerin (German) comes from German Aostataler, from German Aostatal, from German tal, from Middle High German tal, from Old High German tal, from Proto-West Germanic *dal, from Proto-Germanic dalą, from Proto-Indo-European dʰel- — an arch, vaulting, curve, curvature, cavity;...

Ancestry of “Aostatalerin”, step by step

StepLanguageWordMeaning
1GermanAostatalera native or inhabitant of the Aosta Valley, in northwestern Italy
2GermanAostatal
3Germantalvalley
4Middle High Germantal
5Old High Germantalvalley
6Proto-West Germanic*dalvalley, dale
7Proto-Germanicdaląvalley, dale
8Proto-Indo-Europeandʰel-an arch, vaulting, curve, curvature, cavity;...
Every word from Proto-Indo-European dʰel-Every word from Proto-Germanic daląEvery word from Proto-West Germanic *dal