The name of this unit occurs on a single dedicatory inscription from Bowes in County Durham, dated to the governorship of the propraetor Julius Severus (130-3AD). The name is recorded COH IIII F, but it is thought that the final letter may have once been a B, in which case Cohors IV Breucorum is probably meant.
Evidence for the presence of Cohors Quartae Frisiavonum? in Britain
- Bowes? (RIB 739 130-133AD).