Dictionary of Medieval Names
from European Sources

Tedesco m. Proto-Germanic *þiudiskaz 'of the people, popular, vernacular'.

Forms with o for the initial vowel are indicative of Venetian influence.

Italy
Latin
1326 Todeschini (gen) Friuli-14thC no. 434
Cite as: S.L. Uckelman. "Tedesco". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Tedesco.