Marcus Porcius Cato was a Roman senator active during the Principate. He was suffect consul in the latter half of AD 36 as the colleague of Gaius Vettius Rufus.[1] Although he shares the identical name of several members of the Republican Porcii, Ronald Syme expressed reservations that he is related to that famed family.[2] Stephen Dyson has cataloged 56 people living in the provinces of Roman Spain who took on the gentilicium "Porcius", who were either clientes or descendants of clientes of Cato the Elder while he was proconsul of Spain, which makes Syme's suspicions plausible.[3]