They are mentioned as
R[h]edones by
Caesar (mid-1st c. BC),
Rhedones (var.
r[h]iedones,
s[hi]edones) by
Pliny (1st c. AD),
Rhiḗdones (‛Ριήδονες; var. ‛Ρηήδονες),
Rhḗdones (Ῥήδονες) and
Rhēḯdones (Ῥηΐδονες) by
Ptolemy (2nd c. AD), and as
Redonas in the
Notitia Dignitatum (5th c. AD). Their chief town is also attested on inscriptions as
[civ]itas Ried[onum]. isation. Following the discovery of inscriptions featuring this variant in the 1960s, some historians, including Anne-Marie Rouanet-Liesenfelt and Louis Pape, have argued that the form
Riedones should be preferred over
Redones in scholarship, which is not necessary according to linguist
Pierre-Yves Lambert. The city of
Rennes, attested ca. 400 AD as
civitas Redonum ('
civitas of the Redones';
Redonas in 400–441;
Rennes in 1294) is named after the Gallic tribe. == Geography ==