It was speculated that he is to be identified with the future Serbian Archbishop Danilo (Daniel) II. There is no evidence for this suggestion. 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. He was sent in 1298/1299 as emissary by the Serbian King Stefan Uroš II Milutin to the Byzantine Emperor Andronikos II Palaiologos. He met Theodoros Metochites in Thessalonike (ἀλλὰ καὶ σὺν αὐτῷ Τριβαλλὸς εἰς βασιλέα πρεσβεύων παρὰ τοῦ δεσπότου φθάνει γε, ἡμᾶς ἔτ’ ἐν τῇ πόλει, Δεσίσθλαβος ἀνὴρ ὄνομα, ὃς δὴ πρῶτος, ἐμοῦ γ’ ἐξελθόντος ἐκ βασιλέως, αὐτόθι γίγνεται καὶ μέμνησαι πάντως).