Theodosios 31 was a hypatos; owner of a seal dateable to the mid eighth century (around the thirties to the sixties, Seibt): Seibt, Bleisiegel I, no. 207. Obv.: eagle with invocative monogram of Θεοτόκε βοήθει. Rev.: + - Θεοδο - σιω υπ - [α]τω - +. For the date, see Seibt, op. cit., p. 343.

No other seals are attributed by Seibt to this man. Seibt dates the seal of Theodosios 56 (Theodosios hypatos; Zacos and Veglery 709) rather earlier than this, to the second quarter of the eighth century. He identifies as one person Theodosios 57 and Theodosios 58 and perhaps also Theodosios 47.

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