Ποιος χρονολόγησε Julia Avita Mamaea;

Julia Avita Mamaea or Julia Mamaea (14 or 29 August around 182 – March 21/22 235) was a Syrian noble woman and member of the Severan dynasty. She was the mother of Roman emperor Alexander Severus and remained one of his chief advisors throughout his reign. She was killed in 235 by rebel soldiers alongside her son.