English Wiktionary account
Source-reportedEquivalent to *Ōn + hart, derived from Proto-West Germanic *aun- (of uncertain origin, perhaps the oblique case of n-stem Proto-Germanic *awô (“grandfather”), compare *arô), and Proto-West Germanic *hard(ī) (“hard”), from Proto-Germanic *harduz (“hard”).
Sources for this account (1)
- Wiktionary: OnhartCC-BY-SA-4.0 · retrieved 2026-10-15

