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.
[1] He may also possibly be identical with the Arrianus Severus, praefectus aerarii, whose opinion concerning a constitution Divi Trajani is cited by Aburnus Valens.
[2] He wrote a treatise de Interdictis of which the second book is quoted in the Pandects in an extract from Ulpian.
[3] 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.