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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
657 Bertoaldo (abl) CartYonne1 VI; 658 Bertoaldus (nom) DCEL-2 CCCXXXIII; 814 Bertaldus (nom) StVdM-II F26; 833x834 Bertuualt (nom) CartRed IX; 1259 Bertaudus (nom) ArrestReg-volI III, Pentecost; 1300 Bertaudi (gen) CartNDdOurscamp LXIX
Old French
1290 Bertaut (obl) HistHdVParis p. 106; 1291 Bertaut (obl) ibid. p. 107; 1292 Bertaut 1292paris p. 1, (obl) HistHdVParis p. 116; c1294 Bertaut (obl) ibid. p. 125; 1294 Bertaut (obl) ibid. p. 126; 1296 Bertaut (obl) ibid. p. 131, Berthaut paris1296 p. 18; c1298 Bertaut (obl) HistHdVParis p. 138; 1298 Bertaut (obl) ibid. p. 139; 1313 Bertaut Paris1313 p. 3; 1327 Bertaut MemDocMan-2 p. 188
Middle French
1392 Bertaud MemBret-II col. 605; 1418 Bertault DdB1418 p. 204, HGParis p. 379
Cite as: S.L. Uckelman. "Bertwald". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2018, no. 1. http://dmnes.org/2018/1/name/Bertwald.