*aurī

From the stem *aura- of *auraz, formed as a feminine ī/jō-stem. The formation belongs to a Germanic pattern of feminine terrain nouns in *-ī, beside *albī and *meuzī; Old Norse eyrr directly continues *aurī beside Old Norse aurr (Kroonen 2013: 42; van Sluis et al. 2023: 222). In North Germanic, i/j-umlaut regularly changed *au > ey, yielding Old Norse eyrr (Fulk 2018: 63). Its deeper Proto-Indo-European etymology is that of *auraz and remains uncertain; no independent Indo-European cognates can be established for *aurī itself.