What is "maternus"

Maternus was Archbishop of Milan from c. 316 to c. 328. He is honoured as a Saint in the Catholic Church and his feast day is on July 18.

Maternus or Matiernus may refer to:

• Julius Maternus or Matiernus (fl. 87–90), Roman explorer of western Africa
• Maternus of Cologne (285–315; in legend, fl. 1st century), bishop of Trier and Cologne and Catholic saint
• Maternus (bishop of Milan) (fl. 316–328), Archbishop of Milan and Catholic saint
• Julius Firmicus Maternus (fl. 334–346), Latin writer, astrologer, and Christian apologist
• Maternus Cynegius (fl. 381–388), praetorian prefect and consul