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Dictionary of Medieval Names
from European Sources

Gainard m. Old High German gaganen 'advance, meet', Middle High German ge-gan 'march, advance' + Old Saxon hard, Old High German hart 'strong, hard'.

Germany
Latin
802 Kaganhardo (abl) FRA-XXXL 7, Kaganhart (nom) ibid. 8
Cite as: S.L. Uckelman. "Gainard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2018, no. 1. http://dmnes.org/2018/1/name/Gainard.