Tridamus is the name of a deity attested from a single inscription on a sandstone altar from Roman Britain, found in Michaelchurch in present-day Herefordshire. The inscription reads:
'To the god Tridam(us), Bellicus gave (this) altar'
However, alternative readings of the rough-hewn inscription also exist, some of which have read Triv or Trivii for Tridam(us). The altar remains in St Michael's Church in Michaelchurch.
The name Tridamus may be derived from the Proto-Celtic *tri-damos meaning 'three-bovine one'.Proto-Celtic—English lexicon and English—Proto-Celtic lexicon. University of Wales Centre for Advanced Welsh and Celtic Studies. (See also this page for background and disclaimers.) Cf. also the University of Leiden database.
References
Sources British Museum, London, England Lancaster museum, Lancaster, England Newcastle Museum of Antiquities, Newcastle, England Penrith Museum, Penrith, England Verovicium Roman Museum, Housesteads Fort, Northumberland, England York Castle Museum, York, England