Flavia Domitilla is for the first time included in a list of saints in the ninth-century martyrology of Florus of Lyon, in which there is in her regard a long entry based on the "Acts of Nobles Nereus and Achilleus" and which puts her feast on 7 May, perhaps because the "Martyrologium Hieronymianum" had on that date a mention of a Saint Flavius. The same martyrology mentions her also on 12 May, the feast of Saints Nereus and Achilleus, saying (again on the basis of these "Acts") that these were her eunuchs. The martyrology of Ado of Vienne, in the same century, did the same, but more briefly. The ninth-century "Martyrology of Usuard" copied that of Ado and was in turn copied by the "Roman Martyrology" of Caesar Baronius, who gave credence to the legendary "Acts of Saints Nereus and Achilleus" and in 1595 succeeded in having Domitilla's name added in the General Roman Calendar to those of Nereus and Achilleus on their feast, 12 May.