Akakios 3 was a monk in the Stoudite monastery, he is mentioned in two letters written by Theodore the Stoudite (Theodoros 15). In a letter written between 809 and 811 he was one of the monks (ἀδελφοί) identified by a letter of the alphabet secretly to identify them, so that they could be mentioned in correspondence safely; Akakios's letter was ν: Theod. Stud., Ep. 41 (addressed to Silvanus 2 and Euprepianos 1; on the date, see Fatouros, pp. 185*ff.). He is again mentioned in a letter written in winter 817/818 or in spring 818, to the Stoudite monk Symeon 27; Akakios 3 was a cousin of Symeon 27 (ὁ Ἀκάκιος, ὁ κατὰ σάρκα ἀνεψιός σου: p. 482 line 13); he was with the servants of Theodoros 15 and had sent him a letter, apparently because the oikonomos (i.e. Naukratios 1) had been arrested (μετὰ τῶν ὑπηρετούντων μοί εστι καὶ ἔγραψέν μοι. ὁ γὰρ οἰκονόμος συνελήφθη): Theod. Stud., Ep. 342 (Fatouros, p. 482 lines 13-14) = Ep. 243 (Mai). See Fatouros, pp. 354*ff. for the date.

He is mentioned in several sermons of Theodore the Stoudite (Theodoros 15), where he is alluded to as abbas and as the spiritual son of Theodoros: Theod. Stud., Catech. Magna 31, 55, 60, 62, 63, 65, 66 (pp. 230, 394, 426, 436-438, 440, 442, 460, 466ff. Papadopoulos-Kerameus). He was probably living in the monastery of Sakkoudion between 811 and 815 and serving as deutereuon under Sophronios 2: Theod. Stud., Catech. Magna 60. Later he seems to have become hegoumenos of the Sakkoudion monastery, presumably as successor to Sophronios 2: Theod. Stud., Catech. Magna 62 (Theodoros addressed him, writing: ἄρχων εἶ ἄρτι καὶ κεφαλή, τὸν ἐμὸν ἐπέχων τόπον).

(Publishable link for this person: )