Dictionary of Medieval Names
from European Sources

Adalgaria f. Old High German adal 'noble' + Old High German, Old Saxon gēr 'spear'.

Cf. Adalger.

France
Latin
c823 Adalgaria (nom) irminon-vol2 6, Palatiolum
Cite as: S.L. Uckelman. "Adalgaria". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Adalgaria.