Dictionary of Medieval Names
from European Sources

Altberga f. Old High German alt, Old Saxon, Old Frisian ald 'old' + Old High German berg 'mountain, hill'.

France
Latin
c823 Aldeberga (nom) irminon-vol2 1, p. 21, Altegeberga (nom) ibid. 5, CE
Cite as: S.L. Uckelman. "Altberga". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Altberga.