A Stoudite monk, Ammoun 1 was the addressee of a letter from Theodoros 15 (Theodore the Stoudite), of uncertain date; he had formerly been a monk under Theodoros 15 but had now, so Theodoros 15 had heard, abandoned the life of a monk to live as a layman and was living with a woman; Ammoun 1 was urged by Theodoros 15 to leave the woman and return to the monastery; he is addressed as ἀδελφέ: Theod. Stud., Ep. 431 (addressed Ἀμμοῦν τέκνῳ).

Ammoun 1's defection is also mentioned in one of the sermons of Theodoros 15: Theod. Stud., Catech. magn. 10 (p. 67ff., Papadopoulos-Kerameus). He is said to have once induced one of Theodoros 15's disciples, Gelasios 1, to leave the monastery (πεισθέντα τῇ βουλῇ τοῦ ὀφιογνώμονος Ἀμμοῦν): Theod. Stud., Ep. 9 (written some time between 799 and 814).

Probably between 821 and 826 Ammoun 1 was returned to a monastery through the agency of an unnamed kourator (Anonymus 624); Ammoun 1 had apparently been living as a brigand (τὸν λῃστρικῶς πολιτευόμενον); he had formerly been a monk under Theodoros 15 but was now under an unnamed hegoumenos (Anonymus 625), to whom Theodoros 15 wrote a letter about Ammoun 1 (τόν ποτε ἡμέτερον ἀδελφόν, νῦν δὲ ὑπὸ χεῖρά σου τελοῦντα); Theodoros 15 had been anxious about Ammoun 1 for many years (ἀπὸ πολλῶν ἐτῶν); Theodoros 15 had also written a letter (not extant) to Ammoun 1: Theod. Stud., Ep. 493.

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