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Dictionary of Medieval Names
from European Sources

Theinard m. Old Saxon thegan, Old German dhegen, Old High German dëgan 'man, warrior, servant' + Old English heard, Old Saxon hard, Old High German hart 'strong, hard'.

Belgium
Latin
1110 Theinardus (nom) CartStBert 4
Estonia
Middle Low German
1383 Deghenert BbRT p. 337; 1433 Degener ibid. p. 356
Cite as: S.L. Uckelman. "Theinard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2021, no. 1. http://dmnes.org/2021/1/name/Theinard.