Mentioned in the deed of gift of Georgios Kontostephanos Kalameas and his wife Eirene Kontostephanina Kapantritissa for the Monastery of Iberon from December 1309 and in the chrysobull charter of the Byzantine Co-emperor Michael IX. Palaiologos from August 1310 for the Monastery of Iberon on Mount Athos.
The deed denotes him as δοῦλος of the Byzantine Emperor. He was a στρατιώτης.
He and his wife Eirene Kontostephanina Kapantritissa donated several properties to the Monastery of Iberon. Georgios Kontostephanos Kalameas acquired from a certain Karbunares a place called Malesta near Melnik, where he erected the church of Saint George tu Kalamea. He endowed it with vineyard, fields, courtyard, meadow and a mill and gave it together with his wife to the Monastery of Iberon as metochion (καὶ γὰρ τὸ σύνεγγυ̣ς τοῦ κάστρου Μελενίκου, τὸ ἐν τῆ τοποθεσία τῆς Μάλεστας, τὸν ἐξ αγορασίας μου τόπον ἀπὸ τοῦ Καρβουνάρη ἐκείνου, τὸ ἐκ γονικόθεν παρ’ αὐτοῦ κατεχόμενον, σὺν τοῦ ἀμπελῶνος καὶ τῶν χω̣ραφίων, τῆς αὐλῆς, τοῦ ληβαδίου καὶ τοῦ μύλωνος... ὡσαύτως καὶ ἐν τῶ αὐτῶ τόπω ἀνήγειρα ἐκ βάθρου ἐξ οἰκίου κόπου καὶ ἀναλουμάτων θείον καὶ πάνσεπτον ναὸν εἰς ὅνομα τιμώμενον τοῦ ἁγίου καὶ πανενδώξου μεγαλομάρτυρος καὶ τροπαιοφόρου Γεωργίου). The foundation of the metochion was enriched by their donation of the Church of Saint Panteleemon and a couple of houses in Melnik (Ἐπεὶ δὲ εὑρίσκεται καὶ ἐντὸς τοῦ κάστρου Μελενίκου ὁ Ἅγιος Πα̣ν̣τ̣ελεήμων μετὰ καὶ τῶν ὁσπητίων, ὃν ἔκτισα, ἵνα κατέχεται (καὶ) αὐτὸς παρὰ τοῖς μονῆς τοῦ τοῦ Ἁγίου Γεωργίου).