Dictionary of Medieval Names
from European Sources

Adalger m. Old English æþel, Old High German adal 'noble' + Old English gār, Old High German, Old Saxon gēr 'spear'.

Cf. Adalgaria. Alger can also be a variant of Algar.

England
Latin
966 Æðelgarus (nom) CDAS DXXVIII; 967 Æðelgar (nom) ibid. DXXXIII
France
Latin
699 Adalgarius (nom) DCEL-2 Add. X; c823 Adalgarius (nom) irminon-vol2 105, Palatiolum; 862x876 Adalgari (gen) InsMacon X; 1016 Adalger (nom) HGSav-4.1 p. 3; 1096 Aalgerii (gen) St-Bernard-Romans 138; 1179 Algerus (nom) clairvaux-12thc 176
Germany
Latin
822x875 Adalgerus (nom) TradCorb §40, Adilger (nom) ibid. §39; 890 Adalgarium (acc) HambUrk-vol1 XXIII; 891 Adalgario (dat) ibid. XXIV; 895 Adalgario (dat) ibid. XXV; 905 Adalgario (abl) ibid. XXVI
Cite as: S.L. Uckelman. "Adalger". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Adalger.