Theodotus, of whom Eusebius speaks in such high terms in this passage, was bishop of Laodicea for a great many years, and played a prominent part in the Arian controversy, being one of the most zealous supporters of the Arian cause (see Theodoret, H. E. I. 5 and V. 7, and Athanasius de Synodis Arim. et Seleuc. I. 17). He was present at the Council of Nicæa (Labbe, Concil. II. 51), and took part in the council which deposed Eustathius of Antioch, in 330 (according to Theodoret, H. E. I. 21, whose account, though unreliable, is very likely correct so far as its list of bishops is concerned; on the council, see also p. 21, above). He was already dead in the year 341; for his successor, George, was present at the Council of Antioch (In Encæniis), which was held in that year (see Sozomen, H. E. III. 5, and cf. Hefele, Conciliengesch. I. p. 502 sq.). We have no information that he was present at the Council of Tyre, in 335 (as is incorrectly stated by Labbe, who confounds Theodore of Heraclea with Theodotus; see Theodoret, H. E. I. 28). It is, therefore, possible that he was dead at that time, though his absence of course does not prove it. According to Socrates, H. E. II. 46, and Sozomen, H. E. VI. 25, Theodotus had trouble with the two Apolinarii, father and son, who resided at Antioch. We do not know the date of the younger Apolinarius’ birth (the approximate date, 335, given in the article in the Dict. of Christ. Biog. is a gross error), but we can hardly put it much earlier than 320, and therefore as he was a reader in the church, according to Socrates (Sozomen calls him only a youth) in the time of Theodotus, it seems best to put the death of the latter as late as possible, perhaps well on toward 340. The date of his accession is unknown to us; but as Eusebius says that he became bishop straightway after the fall of Stephen, we cannot well put his accession later than 311; so that he held office in all probability some thirty years. Venables’ article on Theodotus, in the Dict. of Christ. Biog. is a tissue of errors, caused by identifying Theodotus with Theodore of Heraclea (an error committed by Labbe before him) and with another Theodotus, present at the Council of Seleucia, in 359 (Athanasius, ibid. I. 12; cf. Hefele, Conciliengesch. I. p. 713).