Eubulus was a Christian martyr who lived in the early 4th century. He traveled to Caesarea Maritima alongside Adrian of Batanea to provide ministry to the local Christian community. Upon their arrival, the pair was detained by guards acting under the orders of Governor Firmilian. Following their imprisonment and torture, Eubulus was eventually executed for refusing to renounce his faith through idol sacrifice. He is remembered as one of the final martyrs of a long period of persecution in the region.