Gaius Julius Proculus was a Roman senator, who held a number of imperial appointments during the reign of Trajan.
Birley also offers two possible relatives for Proculus—Marcus Julius Ro[mu]lus, adlected into the Senate by Claudius, and his presumed son also named Marcus Julius Romulus, assistant to the governor of Sardinia in the term 68/69—whom Birley suggests were Proculus' grandfather and father respectively.
This was followed by a commission as a military tribune in the Legio IV Scythica, then stationed at Zeugma in Syria; upon returning to Rome, Proculus was appointed ab actis for the emperor Trajan.
Also before his consulate Proculus was made a fetial and admitted to the Quindecimviri sacris faciundis, the Roman priesthood entrusted with the care of the Sibylline oracles.
A fragmentary inscription from Larinum, where most of the name of the subject is missing, nevertheless attests someone enjoyed a second consulate; the priesthoods, the governorship in Lugdunensis, and serving as a monetalis listed in this inscription, combined with the last portion of the subject's cognomen has convinced experts to identify the honorand as Gaius Julius Proculus.