Dictionary of Medieval Names
from European Sources

Arthuiu m. Old Breton arth 'bear' + Old Breton uuiu, guiu 'worthy, noble, splendid', Middle Welsh guiu, gwiw 'excellent, splendid'.

France
Latin
833 Arthuiu (nom) CartRed X
Cite as: S.L. Uckelman. "Arthuiu". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Arthuiu.