Dictionary of Medieval Names
from European Sources

Grimbert m. Old High German, Old Saxon grim 'grim, fierce, bold' + Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz.

France
Latin
1378 Grimbert (nom) hanquetvol1 1345
Cite as: S.L. Uckelman. "Grimbert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Grimbert.