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Dictionary of Medieval Names
from European Sources

Ailhard m. Proto-Germanic *agio 'blade' lengthened to Old French agil + Old Saxon hard, Old High German hart 'strong, hard'.

Germany
Latin
822x875 Ailhardus (nom) TradCorb §95, Ailherd (nom) ibid. §22
Cite as: S.L. Uckelman. "Ailhard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2018, no. 1. http://dmnes.org/2018/1/name/Ailhard.