Lucius Cassius Longinus (consul 30)

Lucius Cassius Longinus was a Roman senator who served as suffect consul in AD 30. His family, the Cassii Longini, were a distinguished plebeian family in Rome.

Little is known of his early life or career before his consulship. His consulship in AD 30 is the primary confirmed detail of his life. His colleague was Naevius Cordus Sutorius Macro, a powerful figure during the reign of Emperor Tiberius, who later became Prefect of the Praetorian Guard.

Cassius Longinus is known to have married Julia Drusilla, a daughter of Germanicus and Agrippina the Elder, and therefore a great-granddaughter of Emperor Augustus. This marriage connected him to the imperial family, a relationship that proved to be both advantageous and dangerous in the political climate of the time. They had a daughter named Cassia Longina, who later married Gnaeus Domitius Corbulo.

Later, around 37 AD, after the death of Tiberius and the accession of Caligula, Julia Drusilla died. The circumstances surrounding her death remain unclear. Subsequently, Lucius Cassius Longinus married Aelia Junilla. In AD 41, under the reign of Emperor Claudius, Lucius Cassius Longinus was accused of conspiracy, possibly related to the assassination of Caligula, and was banished to Sardinia.