2. C.AsiniusPollio, grandson of the preceding, and son of C. Asinius Gallus Saloninus and of Vipsania, the daughter of Agrippa, was consul A. D. 23 with C. Antistius Vetus. (Tac. Ann. 4.1; Plin. Nat. 33.1. s. 8.) We learn from coins, a specimen of which is annexed, that he was also proconsul of Asia. The obverse represents Drusus, the son of the emperor Tiberius and Germanicus seated on a curule chair, with the legend ΔΡΟΥΣΟΣ ΚΑΙ ΓΕΡΜΑΝΙΚΟΣ ΚΑΙΣΑΡΕΣ ΝΕΟΙ ΘΕΟΙ ΦΙΛΑΔΕΛΦΟΙ; the reverse a crown of oak leaves, with the legend ΓΑΙΩ ΑΣΙΝΙΩ ΠΟΛΛΙΩΝΙ ΑΝΩΥΠΑΤΩ,, and within the crown ΚΟΙΝΟΥ ΑΣΙΑΣ. Drusus and Germanicus are here called Philadelphi, because they were brothers by adoption; and there was an obvious reason why Pollio had these coins struck, inasmuch as Drusus was the half-brother of Pollio by the same mother Vipsania. (Eckhel, vol. vi. pp. 210, 211.)
A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890