Sts. Tiburtius, Valerian, Maximus
Known by their inclusion in the Acts of St. Cecilia. It is generally accepted that the Acts are fiction, but the three perhaps were genuine martyrs, especially as their tombs in the cemetery of Praetextatus were exceedingly popular duing the Middle Ages. According to the Acts, Valerian was Cecilia's husband, Tiburtius her brother, and Maximus a Roman soldier or official who died with them.
(Taken from Our Sunday Visitor's Encyclopedia of Saints)