 He adopted the name of Severus, in honor of the Severan dynasty, and conferred the imperial title of Augusta to his wife Nonia Celsa and the title of Caesar and name of Antoninus to his son Diadumenianus in honor of the Antonine dynasty, thus making him second in command.At the time of Diadumenian's accession he was eight years old.Despite his equestrian background, Macrinus was accepted by the Senate for two reasons