The story
- Proto-Germanic*hrōþiz
- Proto-Indo-European*bʰerHǵ-
- Proto-Indo-European*bʰer(H)ǵ-tó-s
- Proto-Germanic*berhtaz
- Proto-Germanic*Hrōþiberhtaz
- Proto-West Germanic*Hrōþiberht
- Anglo-NormanRobert
- English todayRobert
From Anglo-Norman Robert, from the Old Frankish cognate of Old High German Hrodperht (normalised form: Ruodberht), from Proto-West Germanic *Hrōþiberht, from Proto-Germanic *Hrōþiberhtaz (literally “shining glory”). Displaced native Old English Hrōþberht from the same source, which would yield English Rothbert. Doublet of Rupert.
Etymology from Wiktionary, CC BY-SA 4.0.