Saint Stephen traditionally venerated as the protomartyr or first martyr of Christianity, was, according to the Acts of the Apostles, a deacon in the early Church at Jerusalem who angered members of various synagogues by his teachings. Wikipedia
Pope Sixtus II was bishop of Rome from 31 August 257 until his death on 6 August 258. He was martyred along with seven deacons, including Lawrence of Rome during the persecution of Christians by Emperor Valerian. Wikipedia
Saint Lawrence or Laurence was one of the seven deacons of the city of Rome, Italy, under Pope Sixtus II who were martyred in the persecution of the Christians that the Roman Emperor Valerian ordered in 258. Wikipedia