Gregorios 63 was basilikos spatharios and strategos of Macedonia; owner of a seal dateable to the early ninth century: Schlumberger, Sig., p. 111, no. 1. The text, as given by Schlumberger, reads: cruciform invocative monogram of Θεοτόκε βοήθει and the legend Γρηγορίῳ βασιλικῷ σπαθαρίῳ καὶ στρατιγῷ Μακεδονίας. The seal is attributed to the reign of the emperor Leo V (Leo 15) and assigned to Gregorios Pterotos (Gregorios 71) who was killed in 822/3. Laurent, REB 6, 1948, p. 77, rejected the identification and assigned this seal to the eighth century, but Nesbitt and Oikonomides, DO Seals I, pp. 110-111, prefer the early ninth century as the cruciform monogram resembles that used by the patriarch of Constantinople in 821 to 837, Antonios 3. Seibt also dates it firmly to the first half of the ninth century, see Winkelmann, Rangstruktur, pp. 101-102.

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