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Dictionary of Medieval Names
from European Sources

Achard m. Proto-Germanic *agio 'blade' + Old Saxon hard, Old High German hart 'strong, hard'.

The name fell out of use around the beginning of the 13th C.

England
Latin
c1132 Achardo (abl) MemStMF II-I; 1185x1186 Achard (abl) PR-XXXVI p. 6
France
Latin
c823 Achardus (nom) irminon-vol2 a, Palatiolum; 1067 Achardi (gen) CartNDSaintes XII; 1067x1074 Achardi (gen) ibid. XIII; 1067x1086 Achardi (gen) ibid. XIV; 1115 Achardus (nom) CartNDJosaphat VI; 1120 Acardus (nom) ibid. VIII; 1138x1162 Achardus (nom) clairvaux-12thc 80; 1147x1158 Achardus (nom) ibid. 35; 1163 Achardi (gen) ibid. 99; 1179 Achardus (nom) ibid. 176; 1180 Acardus (nom) RotScaNor p. 28
Scotland
Latin
1094 Accard (nom) ESC XII
Cite as: S.L. Uckelman. "Achard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 2. http://dmnes.org/2016/2/name/Achard.