Eusebius
Martyrological notice
The historical Roman Martyrology commemorates Eusebius on 15 December. The Latin notice identifies the record as martyr and bishop. The source places the commemoration at Vercellis Ordinatio.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Vercellis Ordinatio sancti Eusebii, Episcopi et Martyris. Decimo septimo Kalendas