wichita.edu
…the Eustachian family, that is, those born of the blood of Octavius, had descended to Tertullus, and confirms this propagation through a donation made to the Monastery of Subiaco. Placidus, like his brothers, having imitated their ancestors even in martyrdom—particularly Octavius, Clement, and Saint Cornelius, most holy Popes and Martyrs—and Eucherius of…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/HistoriaEustachio/historia1.php