Turiacus is a deity, presumably Lusitanian, known from a single Roman dedicatory inscription from Santo Tirso in Portugal. The inscription reads:
L VALERIVS SILVANVS / MILES LEG / VI VICT / O TVRIACO V S L M
A dedication to Turiacus by Lucius Valerius Silvanus of the VI Roman Legion "Victrix". No other inscription references the deity, but attempts have been made to link the name with proto-Celtic *torko- (Irish torc Welsh twrch) meaning a wild boar, as well as with imaginary Irish words supposedly meaning a fort or a king.
References
- CIL II 2374, Hispania Epigraphia 8191
- Cambridge Modern Language Review vol. 14 (1919)