Sinbertm.Gothicsineigs, Latinsenex 'old, senior' or Old High Germansin 'sense; meaning; opinion' + Old High Germanberaht, Old Saxonberht 'bright' from Proto-Germanic*berhtaz.
Cite as: S.L. Uckelman. "Sinbert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2023, no. 1. http://dmnes.org/2023/1/name/Sinbert.