Dictionary of Medieval Names
from European Sources

Ratberga f. Old Saxon rād, Old High German rāt 'counsel, advice' + Old High German berg 'mountain, hill'.

France
Latin
c823 Ratberga (nom) irminon-vol2 47, CE
Cite as: S.L. Uckelman. "Ratberga". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Ratberga.