oannes 176 was basilikos ostiarios and primikerios; owner of a seal dateable on palaeographic grounds approximately between 810 and 840: Seibt, Bleisiegel, no. 50. Obv.: invocative monogram of Θεοτόκε βοήθει with the legend τῷ σῷ δούλῳ. Rev.: Ιωα. - νη β(ασιλικῷ) οστ. - αριω (και) πρη - μηκιρ(ίῳ). The title of basilikos ostiarios was only conferred on eunuchs. The same person was perhaps the owner of a very similar seal, dateable to the ninth century and, according to Seibt, slightly later than the former seal: Zacos and Veglery 2035. The name and titles read: Ἰωάννῃ βασιλικῷ ὀστιαρίῳ καὶ πρημηκιρίῳ. Possibly identical also with Ioannes ostiarios and basilikos protospatharios, owner of two seals dateable also to the ninth century and assigned by Seibt to the third quarter of the ninth century: Zacos and Veglery 2034. The name and titles read: Ἰωάννῃ ὀστιαρίῳ καὶ βασιλικῷ πρωτοσπαθαρίῳ. A seal owned by a Ioannes ostiarios (Ἰωάννης ὀστιάριος) and dated by the editor Konstantopoulos to the eighth or ninth century (Konstantopoulos, JIAN 6, 447) is redated by Seibt to the eleventh century (cf. Ioannes 284).

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