Answer
Claudia Octavia was married to Nero in 54 AD. She was the daughter of Claudius and Messalina, and the sister of Britannicus. Nero was the adopted son of Claudius, and after Claudius died, Nero became emperor. Octavia was married to Nero as a political move to legitimize Nero's rule. However, Nero later divorced Octavia and married Poppaea Sabina.