Agathius - Wikipedia
https://en.wikipedia.org/wiki/Agathius
Saint Agathius (Greek: Ακακιος; died 303), also known as Achatius or Agathonas or Acacius of Byzantium, ... because he would not give up his Christian Faith. The date of his martyrdom is traditionally May 8, when his feast is observed.
May 8 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/May_8_(Eastern_Orthodox_liturgics)
May 7 - Eastern Orthodox Church calendar - May 9. All fixed commemorations below ... 101); The holy group of Soldier Martyrs; Saint Augustina the Martyr, in Byzantium; Saint Agathius (Acacius of Byzantium) (303); Saint Emilia, mother of ...