Arrianus was a Roman jurisconsult of uncertain date. He probably lived under
Trajan, and, according to the conjecture of Grotius, is perhaps the same person as the orator Arrianus, who corresponded with
Pliny the Younger. He may also possibly be identical with the Arrianus Severus,
praefectus aerarii, whose opinion concerning a constitution
Divi Trajani is cited by Aburnus Valens. He wrote a treatise
de Interdictis of which the second book is quoted in the
Pandects in an extract from
Ulpian. In that extract,
Proculus, who lived under
Tiberius, is mentioned in such a manner, that he might be supposed to have written after Arrianus. There is no direct extract from Arrianus in the
Pandects, though he is several times mentioned.