Messuy (Messuwy) was Viceroy of Kush, Governor of the South Lands, Scribe of the Tables of the Two Lands during the reign of Merneptah (reigned 1213-1203 BCE) and perhaps Seti II and Amenmesse.
[1] Messuy was appointed Viceroy of Kush in year 5 of Merneptah and followed Khaemtir in office.
This could explain why he held the military title “Overseer of the Army of the Viceroy”.
Kraus conjectured that Messuy had taken power in Southern Egypt after a short reign of Seti-Merneptah, the son and heir of Merneptah.
[1][5] Others such as Yurco suggest there is no uraeus, but merely weathering of the stone that gives a false impression of one.