Anonymus 653 was the uncle of Platon 1, whom he brought up after the death of Platon 1's parents; he was a zygostates and gave Platon 1 employment under him; Platon 1 allegedly became so adept that his uncle was superfluous and held the office while Platon 1 did the work (συζυγοστατῶν τε αὐτῷ προσειληφότι θείῳ τὰ βασιλικὰ χρήματα. Καὶ τοσοῦτον φανεὶς ἐνταῦθα περιδέξιος, ὡς ὄνομα μόνον ἔχειν ἐκεῖνον τῆς ἀρχῆς, τὸν δὲ τὸ ἔργον γνωρίζεσθαι): Theod. Stud., Laudatio Platonis, I 5 (808A). Anonymus 553 was presumably a brother of either Sergios 100 or Euphemia 4.

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