Marcus Junius Silanus (consul 15)

Marcus Junius C. f. M. n. Silanus (c.26 BC – 37) was an Ancient Roman senator who became suffect consul in 15. His daughter Junia Claudilla was the first wife of Emperor Caligula. His brother was a senator named Decimus Junius Silanus who was banished for having an affair with Vipsania Julia during the reign of Augustus. According to Ronald Syme, he had another brother, Gaius Junius Silanus, the consul of AD 10. His father's name was also Gaius Junius Silanus.

Ancient historians considered Marcus Silanus a highly respected man. When Tiberius came to power, if a judicial decision made by Silanus were appealed to the emperor, Tiberius invariably rejected the appeal, trusting Silanus' decision, and sent the case back to him. He also had the honor of casting the first vote in the Senate, and Silanus successfully talked Tiberius into recalling the banishment of his brother Decimus.

In 33, his daughter Junia Claudilla married Caligula. She died in 36 or early 37 but according to Philo, Silanus continued to treat Caligula as his own son. In November or December of 37, Caligula had him executed for unclear reasons. Suetonius claims he plotted against Caligula while Philo and other sources claim the emperor was simply annoyed by him.