Quadratus or Codratus was a nobleman who was martyed at Nicomedia during the reign of Valerian. His feast day is March 10.
Quadratus, Theodosius, Emmanuel and Companions
This Quadratus or Codratus was a martyred bishop in Anatolia. He was arrested and put to death with forty-two other martyrs, including Emmanuel and Theodosius, during the persecution of the Christians by Diocletian in 304. Their feast day is March 26.