*awô

From a late Proto-Indo-European n-stem *h₂ewh₂-on-, built to the older kinship noun represented by *h₂éwh₂os. Kloekhorst (Kloekhorst 2008: 352–53, s.v. ḫuḫḫa-) reconstructs the latter more originally as the root noun *.h₂éwh₂-s, acc. *h₂éwh₂-m, gen. *h₂uh₂-ós, an analysis supported by the Anatolian alternation and followed for Germanic by Kroonen (2013: 44–45). The n-stem was probably already late Indo-European rather than a Germanic innovation: compare Latin avunculus (de Vaan 2008: 66), derived from *awon- (Lühr 2017: s.v. ôheim), and Proto-Celtic *awon-tīr ~ *awon-tro- (Matasović 2009a: 45). Cognate at the underlying stem level with Latin avus and Hittite 𒄷𒄴𒄩𒀸 (ḫu-uḫ-ḫa-aš /ḫuḫḫaš/) (Mallory & Adams 2006: 209).