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
Cite as: S.L. Uckelman. "Theinard". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Theinard.