Condatis (Gaulish: 'confluence') was an ancient Celtic deity worshipped primarily in northern Britain but also in Gaul. He was associated with the confluences of rivers, in particular within County Durham in the North of England. Condatis is known from several inscriptions in Britain and a single inscription found at Alonnes, Sarthe, France. In each case he is equated with the Roman god Mars.
The theonym Condatis derives from the stem condÃÂt-, meaning 'confluence', itself from Proto-Celtic *kom-dati-, from an earlier *kom-d<sup>h</sup>h<sub>1</sub>-ti- ('put with, put together', i.e. 'grouping, reunion'). According to Xavier Delamarre, his name may originally have meant '(He of the) Reunion' or 'The Reunited (?)' rather than 'The Confluence', a meaning likely connected to mythological elements that have not survived.
The stem condÃÂt- is also attested in personal names, including Condatus, Condatius, and Condatie, as well as in toponyms such as Condé, Condat, Candé, Conte, Condes, Candes, Cosnes, Condate (the old name of Rennes and Northwich), Condom, Condéon (both from *Condate-o-magos), Cond (< *Condate-dunum), Kontz, Conz (Trier), and Canstatt (Condistat).
The cult title is probably related to the place name Condate, often used in Gaul for settlements at the confluence of rivers. The Celtic god Condatis is thought to have functions pertaining to water and healing.
Roman altar-inscriptions to Mars Condates have been found near Roman forts in County Durham in the North of England that may suggest a 'confluence-deity' cult and the possibility that river confluences may have been used as pagan ritual sacrifice or human sacrifice sites.
Roman altars with inscriptions to Mars Condates have been found in the Tees and Wear valleys of County Durham. Altars are normally found at the confluence of rivers â for example, the Cong BurnâÂÂWear confluence near Chester-le-Street â however others may have been disturbed or removed, especially by antiquarians and collectors.
The inscription Mars Condates is a (joining) of deities:
List of altars with inscriptions to Mars Condates:
An example of an altar-inscription to Condatis has been found at Allonnes, Sarthe in France.