Through the insistence of Pallas, his father was convinced to adopt Domitius as his son. Claudius was convinced to do as Augustus had done in adopting Gaius and Lucius Caesar, and as Tiberius had done in adopting Germanicus despite having a son already. It was in February 50 that his father passed a law adopting Domitius into the "Claudii" and naming him Nero, and Domitius became "Nero Claudius Caesar". Nero and Britannicus then became joint-heirs to the emperor, and Agrippina was then given the title of "Augusta".