Martyrologium Hieronymianum – The Martyrologium Hieronymianum or Martyrologium sancti Hieronymi (both meaning “martyrology of Jerome”) is an ancient martyrology or list of Christian martyrs in calendar order, one of the most used and influential of the Middle Ages. It is the oldest surviving general or “universal” martyrology, and the precursor of all later Western martyrologies.

Martyrologium Hieronymianum – Wikipedia

https://en.wikipedia.org/wiki/Martyrologium_Hieronymianum

The Martyrologium Hieronymianum or Martyrologium sancti Hieronymi (both meaning “martyrology of Jerome”) is an ancient martyrology or list of Christian martyrs in calendar order, one of the most used and influential of the Middle Ages. It is the oldest surviving general or “universal” martyrology, and the precursor of all later Western martyrologies.