Konstantinos 28 was known as Patzikos (or possibly "son of Patzikos") (Κωνσταντῖνον τὸν λεγόμενον τοῦ Πατζικοῦ); the brother-in-law of the Bulgar leader Krum 1, he was present at the siege of Constantinople in 813; many years earlier he had fled to the Bulgars, had then married a sister of Krum (Anonyma 3) and had a son (Anonymus 28), who was also present during the siege; he and his son accompanied Krum 1 to a parley with the emperor, and were both captured by the Byzantines when an attempt was made on Krum 1's life: Scriptor Incertus 343-344. Their fate is not recorded. He had perhaps fled to the Bulgars during the reign of Nikephoros I; see Winkelmann, Quellenstudien, p. 159.

(Publishable link for this person: )