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Dictionary of Medieval Names
from European Sources

Bert m. Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz used as a standalone name, or a diminutive of any of various names using this element as a prototheme or deuterotheme.

Austria
Latin
776 Pirhtilo (nom) FRA-XXXL 4; 930 Pirhtilo (nom) UrkStyria 19
France
Latin
697 Bertino (abl) DCEL-2 Add. IX; 699 Bertino (abl) Chart7th p. 570; 1147 Bertino (abl) clairvaux-12thc 15
Italy
Latin
1367 Berti (gen) Livi 149; 1370 Berti (gen) ibid. 265
Italian
1513x1521 Bertino LeoX p. 25
Cite as: S.L. Uckelman. "Bert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Bert.