"Flavia Maximiana Theodora (c. 275 – before 337) was a Roman empress, wife of Constantius Chlorus.
She is often referred to as a stepdaughter of Emperor Maximian by ancient sources, leading to claims by historians Otto Seeck and Ernest Stein that she was born from an earlier marriage between Eutropia, wife of Maximian, and Afranius Hannibalianus. This man was consul in 292 and praetorian prefect under Diocletian.
Timothy Barnes challenges this view stating that all "stepdaughter sources" derive their information from the partially unreliable work Kaisergeschichte (written in the 4th century), while more reliable sources refer Theodora as Maximian's natural daughter. He concludes that she was born no later than c. 275 to an unnamed earlier wife of Maximian, possibly one of Hannibalianus' daughters." - (en.wikipedia.org 11.08.2021)
