Basil the Confessor
Basil the Confessor( died 750) was an Eastern Orthodox saint who lived in the 8th century and was tortured by the Byzantine Emperor Constantine V.
Eudokia (wife of Justinian II)
Eudokia( Late Greek: Εὐδοκία) was the first Empress consort of Byzantine Emperor Justinian II.
Adrianos Komnenos
Adrianos Komnenos was a Byzantine aristocrat and general, and a younger brother of the Byzantine emperor Alexios I Komnenos( r. 1081– 1118).
Paul (father of Maurice)
Paul( died 593) was the father of Maurice, Byzantine Emperor.
He served as head of the Byzantine Senate.
Lê Sỹ Mạnh
Lê Sỹ Mạnh( born December 2, 1984) is a Vietnamese striker who plays for Thanh Hóa F.C.
In 2012, he was called up for the Vietnam national football team to play in the 2012 AFF Suzuki Cup.
In September 2017 he was involved in an incident with Vietnam national football team goalkeeper Đặng Văn Lâm, who after being threatened by Lê Sỹ Mạnh, ran away and injured his ankle.
Lê Sỹ Minh
Lê Sỹ Minh( born 23 March 1993) is a Vietnamese footballer who plays as a midfielder for Nam Định.
Constantine III (Byzantine emperor)
Constantine III( 3 May 612 – 20 April or 24/26 May 641) was Byzantine emperor for four months in 641, making him the shortest reigning Byzantine emperor.
He was the eldest son of the Byzantine Emperor Heraclius and his first wife Eudokia.
Constantine's birth name was Heraclius Novus Constantinus,, which was also the official name under which he reigned.
The name Constantine became established in later Byzantine texts as short for the Emperor and has become standard in modern historiography.
In terms of official imperial nomenclature, the style" Constantine III" would be more appropriate for his son Constans II( r. 641–668).
Nikephoros (son of Artabasdos)
Nikephoros was junior Byzantine Emperor from 741 to 743.
Phocas
Phocas(" Phokas"; c. 547 – 5 October 610) was Byzantine Emperor from 602 to 610.
The early life of Phocas is largely unknown, but he rose to prominence in 602, as a leader in the revolt against Emperor Maurice.
Phocas captured Constantinople and overthrew Maurice on 23 November 602, and declared himself Byzantine Emperor on the same day.
Phocas deeply distrusted the elite of Constantinople, and therefore installed his relatives in high military positions, and brutally purged his opponents.
Phocas was an incompetent leader, both of the administration and army, and under him the Byzantine Empire was threatened by multiple enemies, with frequent raids in the Balkans from the Avars and Slavs, and a Sassanid invasion of the eastern provinces.
Because of Phocas' incompetence and brutality, the Exarch of Africa, Heraclius the Elder, rebelled against him.
Heraclius the Elder's son, Heraclius, succeeded in taking Constantinople on 5 October 610, and executed Phocas on the same day, before declaring himself the Byzantine Emperor.
Alexander (Byzantine emperor)
Alexander(" Alexandros", 870 6 June 913), sometimes numbered Alexander II, or Alexander III ruled as Emperor of the Byzantine Empire in 912–913.

Question: Do Lê Sỹ Mạnh and Alexander (Byzantine Emperor) share the same nationality?
Answer: no