Caldonius bishop of an unknown African see, first appears (Cyprian, Ep. 24) as asking the opinion of Cyprian, and Carthaginian presbyters, as to whether "peace" may not be given to the lapsed, who, on subsequent confession, suffered confiscation and banishment. In 251 he was appointed by Cyprian to visit Carthage, to relieve sufferers by persecution, assist them in resuming their trades, to influence the lapsed, etc. Afterwards he was charged with the excommunication of Felicissimus; and in the same year was sent with Fotumnatus to Rome, from the Carthaginiani synod, to report on the election of Cornelius and the position of Novatian (Ep. 44, 45). They also conveyed to Cornelius the last synodical letter about Felicissibmus, and, copies of Cyprian's forty-first and forty-third epistles on the same subject. In 252 he appears as second bish-op, by seniority, at the Council of Carthage, and in the same rank at the fifth Council of Carthage, in 255.