Titus Aurelius Fulvus Boionius Antoninus entered the world on the 19th of September 86 near Lanuvium in Italy. His father held the consulship of 89 and belonged to the Aurelii Fulvi family settled in Nemausus. This senatorial house rose to prominence under the Flavians, with his grandfather supporting Vespasian's bid for imperial office. The young boy grew up under the care of his maternal grandfather Gnaeus Arrius Antoninus. Contemporaries described this man as a figure of integrity and culture who counted Pliny the Younger among his friends. The Arrii Antonini were an older senatorial family from Italy that wielded significant influence during Nerva's reign. Antoninus's mother later married Publius Julius Lupus, suffect consul in 98, producing two daughters named Arria Lupula and Julia Fadilla.
Adoption And Imperial Succession
Emperor Hadrian selected Antoninus as his successor on the 25th of February 138 following the death of Lucius Aelius. The adoption came with strict conditions requiring Antoninus to take Marcus Annius Verus and Lucius into his own household. These adopted sons would eventually become emperors Marcus Aurelius and Lucius Verus. Antoninus assumed power without opposition despite potential rivals like Lucius Catilius Severus. He acquired the cognomen Pius after compelling the Senate to deify his adoptive father or saving senators condemned by Hadrian. His first act involved persuading the reluctant Senate to grant divine honors to Hadrian. This political maneuvering established his reputation for pietas or dutiful affection within the Roman state structure.