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Dictionary of Medieval Names
from European Sources

Radwise f. Old Saxon rād, Old High German rāt 'counsel, advice' + Old Saxon widu, wido, Old High German witu 'wood'.

France
Latin
c823 Radohis (nom) irminon-vol2 47, CE
Cite as: A. Brown, S.L. Uckelman. "Radwise". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Radwise.