Where does “sydre” come from?

sydre (Norwegian Nynorsk) comes from Old Norse syðri, from Proto-Germanic sunþrizô, from Proto-Germanic sunþraz, from Proto-Indo-European sh₂únt(e)ros, from Proto-Indo-European sóh₂wl̥ — sun.

Ancestry of “sydre”, step by step

StepLanguageWordMeaning
1Old Norsesyðrimore southerly; most southerly
2Proto-Germanicsunþrizôcomparative degree of *sunþraz
3Proto-Germanicsunþrazsouth, southern
4Proto-Indo-Europeansh₂únt(e)ros
5Proto-Indo-Europeansóh₂wl̥sun
Every word from Proto-Indo-European sóh₂wl̥Every word from Proto-Indo-European sh₂únt(e)rosEvery word from Proto-Germanic sunþraz