Title: Bagrat III of Georgia
Content:  Bagrat III (ბაგრატ III) (c. 960 – 7 May 1014), of the Georgian Bagrationi dynasty, was King of Abkhazia from 978 on (as Bagrat II) and King of Georgia from 1008 on. He united these two titles by dynastic inheritance and, through conquest and diplomacy, added more lands to his realm, effectively becoming the first king of the Kingdom of Georgia. Before Bagrat was crowned as king, he had also reigned in Kartli as co-ruler with his father Gurgen from 976 to 978.
Title: Bagrat III of Georgia
Content:  Bagrat was born in about 960 to Gurgen, a Bagrationi Dynasty prince from Kartli, and his wife, Gurandukht, who was a daughter of the king George II of Abkhazia. Being still in his minority, Bagrat was adopted by his childless kinsman David III Kuropalates (r. 990–1000), presiding prince of Tao and the most powerful ruler in the Caucasus. The Abkhazian Kingdom was then under the rule of Theodosius III the Blind, a weak and inauspicious king, who was Bagrat’s uncle by his mother’s side. The kingdom was engulfed into complete chaos and feudal warfare. Exploiting the situation, Prince Kvirike II of Kakheti 
Title: Bagrat IV of Georgia
Content:  Bagrat IV (ბაგრატ IV; 101824 November 1072), of the Bagrationi dynasty, was the King of Georgia from 1027 to 1072. During his long and eventful reign, Bagrat sought to repress the great nobility and to secure Georgia's sovereignty from the Byzantine and Seljuq Empires. In a series of intermingled conflicts, Bagrat succeeded in defeating his most powerful vassals and rivals of the Liparitid family, bringing several feudal enclaves under his control, and reducing the kings of Lorri and Kakheti, as well as the emir of Tbilisi to vassalage. Like many medieval Caucasian rulers, he bore several Byzantine titles, particularly those of nobelissimos, curopalates, and sebastos.
Title: Bagrat (son of Constantine I of Georgia)
Content:  Bagrat (ბაგრატი) was a Georgian royal prince (batonishvili) of the Bagrationi dynasty. Son of King Constantine I of Georgia. Bagrat whose revolt against his reigning brother Alexander I of Georgia is recorded in the 18th-century continuation of the Georgian chronicles, but unattested elsewhere. According to the 20th-century historian Cyril Toumanoff, Bagrat had a daughter Tamar, also known as Nestan-Darejan, who married, in 1445, her cousin, George, co-king of Kakheti and subsequently king of Georgia (as George VIII) and then of Kakheti (as George I). She is last mentioned in 1510.
Title: Bagrat III of Klarjeti
Content:  Prince Bagrat III (died 1028) (ბაგრატ) was a Georgian royal prince of the Bagrationi dynasty from Tao-Klarjeti. He was son of Prince Sumbat III of Klarjeti. Prince Bagrat rebelled against King Bagrat III of Georgia and proclaimed himself as King of Klarjeti. He took refuge in Constantinople. In 1028, the new king Bagrat IV of Georgia imprisoned him and he died during the captivity.
Title: History of Georgia (country)
Content:  his fortunate bloodlines Bagrat was destined to sit upon two thrones. Furthermore, through his mother Gurandukht, sister of the childless Abkhazian king Theodosius III, Bagrat was a potential heir to the realm of Abkhazia. Three years later, after the death of Theodosius III, Bagrat III inherited the Abkhazian throne. In 1008, Gurgen died, and Bagrat succeeded him as "King of the Iberians", becoming thus the first King of a unified realm of Abkhazia and Iberia. After he had secured his patrimony, Bagrat proceeded to press a claim to the easternmost Georgian kingdom of Kakheti-Hereti and annexed it in or around 1010, after two years of fighting and aggressive diplomacy. Bagrat's reign, a period of uttermost importance in the history of Georgia, brought about the final victory of the 
Title: Bagrat V of Georgia
Content:  Bagrat V the Great (ბაგრატ V დიდი, Bagrat V Didi) (died 1393) from the Bagrationi dynasty was the son of the Georgian king David IX of Georgia by his wife Sindukhtar Jaqeli. He was co-ruler from 1355, and became king after the death of his father in 1360.
Title: Prince Bagrat of Georgia
Content:  Bagrat (ბაგრატი) (8 May 1776 – 8 May 1841) was a Georgian royal prince (batonishvili) of the House of Bagrationi and an author. A son of King George XII of Georgia, Bagrat occupied important administrative posts in the last years of the Georgian monarchy, after whose abolition by the Russian Empire in 1801 he entered the imperial civil service. He was known in Russia as the tsarevich Bagrat Georgievich Gruzinsky (Баграт Георгиевич Грузи́нский). He is the author of works in the history of Georgia, veterinary medicine and economics.
Title: Bagrat IV of Georgia
Content:  Bagrat was the son of the king George I ((r. 1014 – 1027)) by his first wife Mariam of Vaspurakan. At the age of three, Bagrat was surrendered by his father as a hostage to the Byzantine emperor Basil II ((r. 976 – 1025)) as a price for George's defeat in the 1022 war with the Byzantines. The young child Bagrat spent the next three years in the imperial capital of Constantinople and was released in 1025. He was still in Byzantine territory when Basil died and was succeeded by his brother Constantine VIII ((r. 1025 – 1028)). Constantine ordered the retrieval of the young prince, but the imperial courier was unable to overtake Bagrat – he was already in the Georgian kingdom. After George I died in 1027, 
Title: George III of Georgia
Content:  George III (გიორგი III) (died 27 March 1184), of the Bagrationi dynasty, was the 8th King of Georgia from 1156 to 1184. He became King when his Father Demetrius I died in 1156, which was preceded by his  brother's revolt against king Demetrius I in 1154. His reign was part of what would be called the Georgian Golden Age – a historical period in the High Middle Ages, during which the Kingdom of Georgia reached the peak of its military power and development. George was the father of Queen Tamar the Great.

Question: Who is the father of Bagrat III of Georgia?
Answer: Gurgen of Georgia.