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Dictionary of Medieval Names
from European Sources

Bertwald m. Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz + Old Saxon wald, Old High German walt 'power, authority'.

England
Latin
994 Beorhtwalt (nom) CDAS DCLXXXVI
France
Latin
658 Bertoaldus (nom) DCEL-2 CCCXXXIII; 1259 Bertaudus (nom) ArrestReg-volI III, Pentecost; 1300 Bertaudi (gen) CartNDdOurscamp LXIX
Old French
1296 Berthaut paris1296 p. 18; 1313 Bertaut Paris1313 p. 3; 1327 Bertaut MemDocMan-2 p. 188
Middle French
1392 Bertaud MemBret-II col. 605; 1418 Bertault HGParis p. 379
Cite as: S.L. Uckelman. "Bertwald". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 3. http://dmnes.org/2015/3/name/Bertwald.