Serach (Khazar)
In the Schechter Letter, Serakh is the wife of the Khazar ruler Sabriel.
A Jew, she encourages her husband and other Khazars to convert to Judaism and establish it as the official religion of Khazaria.
Serakh is not mentioned in the Khazar Correspondence or the Kuzari.
Some scholars have postulated that the Khazar conversion to Judaism came as a result of contact with existing Jewish populations in the Crimea and the Caucasus, possibly the ancestors of the Krymchaks or Mountain Jews.
As with so much of Khazar studies, the absence of documentary evidence renders the question of whether Serakh belonged to one of these groups a matter of speculation.
Bihar (Khazar)
Bihar was a Khagan of the Khazars during the 730s.
Bihar was the father of Tzitzak, the Khazar princess who married the son of Byzantine Emperor Leo III who later ruled as Constantine V. Bihar was thus the grandfather of Emperor Leo IV the Khazar.
He is called" Viharos" in Armenian sources.
Balgitzin
Balgitzin( died 704), in the account of Theophanes the Confessor, was the Khazar tudun of Phanagoria during the sojourn of Justinian II in that town.
He was dispatched, along with Papatzys, by Busir Khagan to kill Justinian in 704, after Busir was bribed by Tiberius III.
Justinian's Khazar wife Theodora warned him in advance and Justinian escaped by sea, but not before murdering both Papatzys and Balgitzin.
Some scholars, notably Peter B. Golden, have speculated that Balgitzin is not a proper name but rather a title, identical with Baliqchi.
Papatzys
Papatzys( died 704) was, in the account of Theophanes the Confessor, the Khazar" tudun" of Kerch during the sojourn of Byzantine emperor Justinian II in Phanagoria.
He was dispatched, along with Balgitzin, by Busir Khagan to kill Justinian in 704, after Busir was bribed by Tiberius III.
Justinian's Khazar wife Theodora warned him in advance and Justinian escaped by sea, but not before murdering both Papatzys and Balgitzin.
Oshin of Korikos
Oshin of Korikos( or Corycos)( died 1329) served as regent of the Armenian Kingdom of Cilicia from 1320 to 1329.
He was the son of the historian Hayton of Korikos.
He became regent for Leo IV on the death of King Oshin in 1320, whom he was rumoured to have poisoned.
Oshin was also probably responsible for the deaths of King Oshin's sister Princess Isabella of Armenia and two of her sons, in order to remove rival claimants.
Oshin married twice: Oshin and his daughter Alice( Leo's wife) were assassinated in 1329 at the behest of Leo IV.
Leo IV the Khazar
Leo IV "the Khazar"
(Greek:
Λέων Δ΄ ὁ Χάζαρος, "Leōn IV ho Khazaros"; 25 January 750 – 8 September 780) was Byzantine Emperor from 775 to 780 AD.
He was born to Emperor Constantine V and Empress Tzitzak in 750.
He was elevated to caesar the next year, in 751, and married to Irene of Athens in 768.
When Constantine V died in September 775, while campaigning against the Bulgarians, Leo IV became senior emperor on 14 September 775.
In 778 Leo raided Abbasid Syria, decisively defeating the Abbasid army outside of Germanicia.
Leo died on 8 September 780, of tuberculosis.
He was meant to be succeeded by his son Constantine VI, but rule instead transferred to his wife Irene, who assumed the role of regent and later empress.
Theophanes the Confessor
Saint Theophanes the Confessor( c. 758/760 – March 12, 817/818) was a member of the Byzantine aristocracy who became a monk and chronicler.
He served in the court of Emperor Leo IV the Khazar before taking up the religious life.
Theophanes attended the Second Council of Nicaea in 787 and resisted the iconoclasm of Leo V the Armenian, for which he was imprisoned.
He died shortly after his release.
Theophanes is venerated on March 12 in the Eastern Orthodox Church and the Roman Catholic Church.
( He should not be confused with Theophanes of Nicaea, whose is commemorated on October 11.)
Aguk Shain
Aguk Shain was an 8th- century Chechen commander in the Arab- Khazar Wars.
Shain is mentioned in the book Yu Aidaeva" Chechens: Past and Present", where he is described as the head of the Chechen- auhovtsev( auharov), which was involved in the Khazar wars with the Arabs.
He was, the author assumes, the second person in the Khazar army.
In addition, excavations on the outskirts of the Giachalk( Khazar- Kala) village show that he had close economic ties with Akkins Khazars.
Shain led some of the Khazar troops.
This confirmed the inclusion of Chechens in the Khazar Khanate, to which they were loyal.
The 735–736 Arabic commander Nirvana managed to destroy the fortress" Hasni- Hisnumma"( Khazar- Kala) and capture the fortress auhovs" KeshKeshen" Keshne).
These fortresses were inhabited by Chechens auhar( Akkins); however, he was then captured himself.
Igor Ponomaryov
Igor Anatolyevich Ponomaryov( born 24 February 1960 in Baku) is a retired Soviet football player and currently manager of the Khazar Lankaran.
Irene of Athens
Irene of Athens (752 – 9 August 803), also known as Irene Sarantapechaina, was Byzantine empress consort by marriage to Leo IV from 775 to 780, regent during the minority of her son Constantine VI from 780 until 790, co-regent from 792 until 797, and finally sole ruler and first empress regnant of the Byzantine Empire from 797 to 802.
A member of the politically prominent Sarantapechos family, she was selected as Leo IV's bride for unknown reasons in 768.
Even though her husband was an iconoclast, she harbored iconophile sympathies.
During her rule as regent, she called the Second Council of Nicaea in 787, which condemned iconoclasm as heretical and brought an end to the first iconoclast period (730–787).
As Irene's son Constantine reached maturity, he began to move out from under the influence of his mother.
In the early 790s, several attempted revolts tried to proclaim him as sole ruler.
In 797, Irene gouged out her son's eyes, maiming him so severely that he died a few days later.
With her son dead, Irene proclaimed herself sole ruler.
Irene's alleged unprecedented status as a female ruler of the Roman Empire (there had been women ruling the empire in their own right before, notably Pulcheria) led Pope Leo III to proclaim Charlemagne emperor of the Holy Roman Empire on Christmas Day of 800 under the pretext that a woman could not rule and so the throne of the Roman Empire was actually vacant.
A revolt in 802 overthrew Irene and exiled her to the island of Lesbos, supplanting her on the throne with Nikephoros I. Irene died in exile less than a year later.

Question: Which country Leo Iv The Khazar's wife is from?