Dictionary of Medieval Names
from European Sources

Adegar m. Old Frankish ad, perhaps a reduction of Old High German adal 'noble' + Old High German, Old Saxon gēr 'spear'.

France
Latin
c823 Adegarius (nom) irminon-vol2 33, Wan
Cite as: S.L. Uckelman. "Adegar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Adegar.