Titus Pomponius Antistianus Funisulanus Vettonianus was a Roman senator active in the first quarter of the second century AD. He was suffect consul for the nundinium May-June AD 121 with Lucius Pomponius Silvanus as his colleague. Vettonianus is known only from inscriptions.
The family background of Vettonianus is sketchy. Bernard Rémy, in his prosopography of imperial governors of Anatolia, is certain he is not the same person as Titus Pomponius Mamilianus Rufus Antistianus Funisulanus Vettonianus, attested as commander of Legio XX Valeria Victrix, while admitting the two Funisulani are closely related. Besides the similar names, they share the same tribus, Galeria. Anthony Birley speculates that the legionary commander may be the father of our Vettonianus. It is also clear that both of these are somehow related to the Flavian general Lucius Funisulanus Vettonianus, but that general belonged to a different tribe, Aniensis. Beyond this, nothing can be said of his origins.
Prior to his consulate, all we know about the life of Vettonianus is that he was governor of the imperial province of Lycia et Pamphylia. Werner Eck dates his governorship from the year 117 to 120, between the governorship of his immediate predecessor Gaius Trebius Maximus and his consulship; Rémy concurs with these dates.
Vettonianus' life after he stepped down from the consulship is a blank.