[1] Fabia had three siblings: a sister Ceionia Plautia and two brothers: the Roman Emperor Lucius Verus who co-ruled with Marcus Aurelius from 161 to 169 and Gaius Avidius Ceionius Commodus.
Her maternal grandparents were the Roman Senator Gaius Avidius Nigrinus and the surmised but undocumented noblewoman Plautia.
Although Fabia and Aurelius became engaged, the engagement did not survive Hadrian; immediately after the emperor's death, Antoninus Pius, Hadrian's second adopted son and the new emperor, approached Marcus and requested that his marriage arrangements be amended: Marcus' betrothal to Ceionia Fabia would be annulled, and he would be betrothed to Faustina, Antoninus' daughter, instead.
These inscriptions honor Fabia as the mother of Marcus Peducaeus Plautius Quintillus; the sister of Roman Emperor Lucius Verus and the sister-in-law of Empress Lucilla (the second daughter of Marcus Aurelius and Faustina the Younger, who was one of the sisters of Fadilla).
According to an inscription found at Ephesus, Fabia was present when Lucius Verus married Lucilla.