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
An AR Denarius struck 2 BC - 4 AD in Lugdunum
Obverse: laureate head right; CAESAR AVGVSTVS__DIVI F PATER PATRIAE

Reverse: Lucius Caesar and Caius Caesar facing, wearing toga, holding shield on the ground and spear, simpulum and lituus (b9) above; AVGVSTI F COS DESIG PRINC IVVENT / C L CAESARES

Diameter: 18 mm
Die Orientation: -
Weight: 3.61 g
The brothers, Caius and Lucius, were the sons of Agrippa and Julia, daughter of Augustus. They were due to succeed Augustus but predeceased him in 4 and 2 A.D. respectively. Gaius, the elder of the two brothers has his shield placed in front of that of his younger brother and the ladle above him marking him as Pontifex. Lucius has lituus above marking him as augur.
RIC I 207, RSC I 43, BMCRE I 533, BnF I 1651 ff., SRCV I 1597
An AR Denarius struck 2 BC-4 AD in Lugdunum
Obverse: CAESAR AVGVSTVS DIVI F PATER PATRIAE, Head of Augustus facing right, wearing laurel wreath

Reverse: C L CAESARES AVGVSTI F COS DESIG PRINC IVVENT, Gaius and Lucius Caesar standing, each, wearing togas, resting hand on shield and spear, simpulum, right, and lituus, left, flanking, left and right respectively

Diameter: 20 mm
Die Orientation: 4 H
Weight: 3.8 g
No notes for this coin
RIC I (2nd Ed.) Augustus 207
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