Symeon 11 was a basilikos protospatharios and strategos of Thessalonike; owner of a seal dateable to the ninth or tenth century: Schlumberger, Sig., p. 103, no. 2 (in the Cabinet des M dailles in Paris). Obv.: no description. Rev.: Συμεὼν βασιλικὸς πρωτοσπαθάριος καὶ στρατηγὸς Θεσσαλονίκης. On the date cf. Winkelmann, Rangstruktur, p. 106.

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