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Dictionary of Medieval Names
from European Sources

Theudo m. Gothic þiuda 'people, folk' used as a standalone name, or a pet form of any of various names beginning with this element.

France
Latin
c823 Teodo (nom) irminon-vol2 9, CE; 942 Teuddi (gen) St-Bernard-Romans 131; 1079x1101 Teudone (abl) CartStPC XXXVII; 1107 Teudo (nom) ibid. V
1158x1170 Tecelinus (nom) clairvaux-12thc 138; 1179 Tescelino (nom) ibid. 177
Switzerland
Latin
1161 Tecelinus (nom) CartHaut 10
Cite as: S.L. Uckelman. "Theudo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 3. http://dmnes.org/2015/3/name/Theudo.