Dictionary of Medieval Names
from European Sources

Theinger m. Old Saxon thegan, Old German dhegen, Old High German dëgan 'man, warrior, servant' + Old High German, Old Saxon gēr 'spear'.

Belgium
Latin
1120 Theingeri (gen) CartStBert 9
Cite as: S.L. Uckelman. "Theinger". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Theinger.