Tetus
Τῆτος
Tetus (Τῆτος), a river on the Atlantic coast of Gallia, which Ptolemy (2.8.2) places between the Staliocanus Portus and Argenus, or the outlet of the river Argenus, if that is the true reading. It is impossible to determine what river is the Tetus. D'Anville assumes the place to be the bay of Seu, which receives the rivers Sée and Sélune. Others take the Tetus to be the Treguier or Trieu. (Ukert, Gallien, p. 144.)
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.