Adoptivkaiser
His paternal grandfather, Gnaeus Claudius Severus Arabianus, was also a Senator and Peripatetic philosopher, and one of the teachers of Marcus Aurelius, whom he later befriended. His maternal grandparents were Marcus Aurelius and Faustina the Younger. Through his mother, Severus Proculus was a relative to the ruling Nerva–Antonine dynasty of the Roman Empire and among his maternal aunts and uncles were the Empress Lucilla and Emperor Commodus.