Tiberius Claudius Caesar Britannicus, usually called Britannicus, was the son of Roman Emperor Claudius and his third wife, Valeria Messalina. For a time, he was considered his father's heir, but that
Detail of Britannicus from a c. 45 AD statue with him and his mother
A sestertius issued to commemorate Britannicus' birth
Messalina holding her son Britannicus, Louvre
Nero was Roman emperor from AD 54 until his suicide in AD 68, as the final emperor of the Julio-Claudian dynasty.
Britannicus
…year, his father married Agrippina the Younger, Claudius' fourth and final marriage. Their marriage was followed by the adoption of Agrippina's son, Lucius Domitius Ahenobarbus, whose name became Nero as a result. His stepbrother would later be married to Britannicus' sister Octavia and soon eclipsed him as Claudius' heir…
Roman marble head of Nero from an oversized statue, Glyptothek museum
Statue of Nero in his birthplace of Anzio, Italy
Relief from the Sebasteion depicting Nero and his mother, Agrippina