The Cohors Primae Celtiberorum or The First Cohort of Celtiberians are Mentioned only on military diplomata dated to the early-mid second century, the garrison post(s) of this unit remains unknown.

Evidence for the presence of Cohors Primae Celtiberorum in Britain

1. Military Diplomata – Late AD105
2. Military Diplomata 122AD
3. Military Diplomata (AD 158)