From Etruscan 𐌕𐌖𐌕𐌄𐌓𐌄 (tutere).
Tuder n (indeclinable)
- A city in Umbria situated on a hill above the valley of Tiber, now Todi
- “Tuder”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
- Tuder in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.