English Wiktionary account
Source-reportedUncertain; likely from Proto-West Germanic *suni (“true”) (from Proto-Germanic *sunjaz) + *berht (“bright”), but may instead be a corruption of Suonberht, with the first element from Old High German suona (“reconciliation”), from Proto-West Germanic *swōnu.
Sources for this account (1)
- Wiktionary: SuniberhtCC-BY-SA-4.0 · retrieved 2026-10-15
