Probably identical with the mesazon Georgios (PLP 4030), who is mentioned by the Byzantine historian Georgios Pachymeres. The mesazon participated in the peace negotiations between Byzantium and Serbia between 1267 and 1269 (καὶ ἤδη καὶ πρὸς Λιπαίνιον ἰόντων, πέμπεται μὲν πρέσβις ἐκεῖθεν ὁ καὶ μεσάζων ἐκείνων, Γεώργιος τοὔνομα, ᾧ δὴ καὶ λόχος ἀνδρῶν ἐνεδρεύσας προσεζημίου). He partook in the arrangment of the marriage project between the Byzantine princess Anna and the Serbian prince Stefan Uroš Milutin, which collapsed. Georgios (PLP 4030) was involved in several Serbian diplomatic envoys to Charles I Anjou, the King of Sicily. Mentioned in the sermon of the Byzantine writer Theodoros Metochites, who undertook the task to arrange the marriage of the Byzantine princess Simonis with the Serbian King Stefan Uroš II Milutin. Theodoros Metochites expressed his position and dignity on the court of the Serbian King with the words „καθάπαξ τῷ δεσπότῃ καὶ τῶν σφόδρα, πιστῶς τε καὶ οἰκείως ἐχόντων“. He was the second commander of the Serbian army in the ranking (καὶ μάλιστα ἐν τοῖς ἡμετέροις, τιμῆς τε διὰ ταῦτ’ ἄρα πάντα ἀξιοῦται τὲ καὶ ἐπικέκληται, ἧστινος δὴ ταύτης, ἡγεμὼν ἐν τοῖς τοῦ γένους στρατεύμασι δεύτερος). He was the member of the Serbian advisory council (καὶ κοινωνούντων βουλῆς τε καὶ λόγων καὶ φροντισμάτων· καὶ πάσης σκέψεως· ἅτ’ εὔνους τὲ ὢν αὐτῷ, δὴ, καὶ σφόδρα· καὶ νοῦν ἔχων ἐφ’ ἑκάστοις αὐτῷ κοινωνεῖν· καὶ μεταχειρίζειν τὲ καὶ συμβάλλειν τῶν τε ἔργων καὶ τῶν λόγων). He was the father of the Monk (starec) Isaias according to the opinion of Miodrag A. Purković. Starec Isaias came to the court of the Serbian king in his younger years at his father’s wish. Purković argues for the identity of the commander Georgios and the father of starec Isaias exactly on the account of the closeness to the Serbian king (Rodi že se pri blagočastivěmь i hristoljubivemь samodrьžci vsee srьpskie zemle i podunavskie i pomorskie i arbanaškïe svetomь krali Uroši. Ōtь blagorodnu i blagōčastivu roditelju, ōtьca Geōrgïa matere že Kalïni...běše bo mnogoljubimь roditeli svoimi. i hotěhu jego prědati vь polatu carevi. onь že poslušavь stvori imь volju vь malo vreme). The Father of starec Isaias was married to Kalina. He became a monk with the name Gerasimos. His wife Kalina became a nun with the name Theōdosïa (i sihь prěimenovavь, ōtьca Gerasimь, matere že Theōdosïa). He fought against the byzantine emperor in a battle before 1298. He was captured and imprisoned by the Byzantines. The Byzantine Emperor Andronikos II and the Constantinopolitan elite knew him according to the report of Theodoros Metochites. He was of the initiators and a main proponent of the peace negotiations between the Serbians and Byzantines and the preparation of the marriage. (ἦν δ’ ἐν τούτοις μάλισθ’ ὁ λέγειν ἔχων καὶ πρῶτα φέρων, Γεώργιος· Γεώργιος οἶσθ’ ὃς πρότερον, ἐνειρκτο δέσμιος ἐκ μάχης τῷ βασιλεῖ· συνήθης τὲ ἐκεῖθεν μάλιστ’ ἐκ τῆς χρονίου καθείρξεως αὐτῷ τε βασιλεῖ γεγονὼς, καὶ ἡμῖν· καὶ τὰς παρούσας καταλλαγὰς καὶ συμβάσεις, ἐπὶ τῷ κήδει πρῶτος αὐτόθι προδείξας καὶ ἐνηργμένος· καὶ καθυπουργήσας εἰς τὰ μάλιστα· ὡς ἐντεῦθεν ἄρα, καὶ μάλισθ’ ὡς πεῖραν ἤδη τιν’ ἡμῶν καὶ τῶν ἡμετέρων ἐσχηκὼς κρείττω, ἢ κατὰ τοὺς ἄλλους τῆς ἐκ τοῦ ἔθνους, καὶ τῆς ἁπάσης ἡμῖν προξενεῖν ἀμέλει πρεσβείας ἀξιοῦσθαι. ἕστι δὲ κἀν τοῖς μάλισθ’ ὁ ἀνήρ, καθάπαξ τῷ δεσπότῃ καὶ τῶν σφόδρα, πιστῶς τε καὶ οἰκείως ἐχόντων).