10. SEMIPRONIUS) GRACCHUS, a paramour of Julia, the daughter of Augustus, while she was the wife of M. Agrippa. He continued his connection with her after she was married to Tiberius, and inflamed her hatred against her husband. On Julia's banishment, Gracchus was also banished to Cercina, an island off the African coast. There he lived till the accession of Tiberius, who had him put to death, A. D. 14 (Tac. Ann. 1.53; Vell. 1.100). There are several coins struck by a Tib. Sempronius Gracchus (see the specimen below), which are usually referred to the above-mentioned Gracchus. But as many of these coins were struck in the time of Julius Caesar, they belong more probably to the ancestor of the Gracchus put to death in A. D. 14.
[L.S]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