Ποιος χρονολόγησε Μάρκος Ουμίδιος Κουαδράτος Ανιανός;

Marcia Aurelia Ceionia Demetrias (died 193) was the alleged mistress (182–193) and one of the assassins of Roman Emperor Commodus. Marcia was likely to have been the daughter of Marcus Aurelius Sabinianus Euhodius, a freedman of the co-emperor Lucius Verus.