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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 2015, no. 3. http://dmnes.org/2015/3/name/Adalgaria.