Tranquillini
Martyrological notice
The historical Roman Martyrology commemorates Tranquillini on 6 July. The Latin notice identifies the record as martyr and apostle. The source places the commemoration at Romae.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Romae natalis sancti Tranquillini Martyris, patris sanctorum Marci et Marcelliani, qui, ad praedicationem sancti Sebastiani Martyris conversus ad Christum, a beato Polycarpo Presbytero baptizatus est, et a sancto Cajo Papa Presbyter ordinatus. Ipse, die Octavarum Apostolorum, cum ad confessionem beati Pauli oraret, ibidem, sub Diocletiano Imperatore, a Paganis tentus est, et, ab eis lapidatus, martyrium consummavit.