Dictionary of Medieval Names
from European Sources

Gerbern m. Old High German, Old Saxon gēr 'spear' + Old High German, Old Saxon bero 'bear'.

France
Latin
c1050 Girberno (abl) StVdM-II 696
Germany
Latin
822x875 Gerberno (abl) TradCorb §139
Cite as: S.L. Uckelman. "Gerbern". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Gerbern.