Dictionary of Medieval Names
from European Sources

Ailgrim m. Proto-Germanic *agio 'blade' lengthened to Old French agil + Old High German, Old Saxon grim 'grim, fierce, bold'.

England
Latin
1189 Eilgrinus (nom) GASurv p. 133
Germany
Latin
822x875 Aegilgrim (nom) TradCorb §105, Eilgrim (nom) ibid. §223
Cite as: S.L. Uckelman. "Ailgrim". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Ailgrim.