Dictionary of Medieval Names
from European Sources

Sisbert m. Old High German sisu 'lament, song' + Old High German beraht, Old Saxon berht 'bright' from Proto-Germanic *berhtaz.

France
Latin
c1035 Sisbertus (nom) StVdM-II 718; c1040 Sisberto (abl) ibid. 723; 1066 Sisbertus (nom) ibid. 698
Cite as: S.L. Uckelman. "Sisbert". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Sisbert.