Lucius Caesar Caesar of the Roman Empire from 17 BC to 2 AD.
Lucius Caesar was the grandson of Augustus. The son of Marcus Vipsanius Agrippa and Julia the Elder, Augustus' only daughter, Lucius was adopted by his grandfather along with his older brother, Gaius Caesar.

As the emperor's adopted sons and joint-heirs to the Roman Empire, Lucius and Gaius had promising political and military careers. However, Lucius died of a sudden illness on 20 August AD 2, in Massilia, Gaul, while traveling to meet the Roman army in Hispania. His brother Gaius also died at a relatively young age on 21 February, AD 4.
Lucius Caesar
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An AE Half-Unit struck ca. 1 AD in Pergamum
Obverse: ΓΑΙΟΝ ΚΕΦΑΛΙΩΝ, Bare head of Gaius facing right

Reverse: ΛΕVΚΙΩΝ, Bare head of Lucius facing right

Diameter: 18 mm
Die Orientation: 12 H
Weight: 3.79 g
Kephalion as grammateus RPC specifically calls the metal brass.
RPC I 2363