Question: How many sons did "The Hitman"'s father have?

Context paragraphs:
Herleif: Herleif (Latinized as Herleifus) was one of the earliest legendary Danish kings according to Arngrímur Jónsson's Latin summary of the lost Skjöldunga saga.  He was the son of Frodo I and the father of Havardus "hinn handramme" and Leifus "hinn frekne".  He supposedly "left behind many sons" but their names are not recorded and they seem to be excluded from the royal line of succession.

Mugrón mac Flainn: Mugrón mac Flainn (died 782) was a king of the Uí Failge, a Laigin people of County Offaly.  He was one of the many sons of Fland Dá Chongal, a previous king.  He ruled from 770 to 782.  He was the third of Fland's sons by Érenach, daughter of Murchad Midi (died 715) of Uisnech to hold the throne.

Urizen: In the complex mythology of William Blake, Urizen is the embodiment of conventional reason and law.  He is usually depicted as a bearded old man; he sometimes bears architect's tools, to create and constrain the universe; or nets, with which he ensnares people in webs of law and conventional society.  Originally, Urizen represented one half of a two-part system, with him representing reason and Los, his opposition, representing imagination.  In Blake's reworking of his mythical system, Urizen is one of the four "Zoas" that result from the division of the primordial man, Albion, and he continues to represent reason.  He has an Emanation, or paired female equivalent, Ahania, who stands for Pleasure.  In Blake's myth, Urizen is joined by many daughters with three representing aspects of the body.  He is also joined by many sons, with four representing the four elements.  These sons join in rebellion against their father but are later united in the Last Judgment.  In many of Blake's books, Urizen is seen with four books that represent the various laws that he places upon humanity.

Bret Hart: Bret Sergeant Hart (born July 2, 1957), better known by the ring name Bret "The Hitman" Hart, is a Canadian-American retired professional wrestler, retired amateur wrestler, writer and actor.  A member of the Hart wrestling family and a second-generation wrestler, he has an amateur wrestling background, wrestling at Ernest Manning High School and Mount Royal College.  A major international draw within professional wrestling, he has been credited with changing the perception of mainstream North-American professional wrestling in the early 1990s by bringing technical in-ring performance to the fore.  Hart is widely regarded as one of the greatest professional wrestlers of all time; Sky Sports noted that his legacy is that of "one of, if not the greatest, to have ever graced the squared circle".

Cummascach mac Flainn: Cummascach mac Flainn (died 757) was a king of the Uí Failge, a Laigin people of County Offaly.  He was one of the many sons of Fland Dá Chongal, a previous king.  He ruled from 755 to 757.  He was the first of Fland's sons by Érenach, daughter of Murchad Midi (died 715) of Uisnech to hold the throne.

Bukhari Sadaat: Bukhari Sadaat are a people living on the Indian subcontinent (modern India, Pakistan, Bangladesh, and Sri Lanka).  Most are descendants of Hazrat Jalaluddin Surkh-Posh Bukahri (Urdu: جلال الدین سرخ پوش بخاری c. 595-690 AH, 1199–1291 AD), who migrated from Bukhara, in modern Uzbekistan, in 635 AH and settled in a town then called Deogarh (modern Uchh).  Hazrat Jalaluddin Surkh-Posh Bukahri had many sons—some assert that he had 18 sons and others claim he had 21 sons.  His descendants are widely spread all over South Asia (the Indian Sub-Continent,برصغير).

Prem Kaur: Rani Prem Kaur, was the daughter of Lambardar Hari Singh Waraich a Jatt Sikh of the village of Ladhewala Waraich, in Gujranwala district of the Punjab, was married in 1822 to Prince Sher Singh, one of the many sons of Maharaja Ranjit Singh.

Hart wrestling family: The Hart wrestling family, sometimes known as the Hart dynasty is a mainly Canadian family with a significant history within professional wrestling.  The patriarch of the family was wrestling legend Stu Hart (1915–2003).  An amateur and professional wrestling performer, promoter and trainer, Stu not only owned and operated his own wrestling promotion, Stampede Wrestling, but also trained some of the most well known and successful stars in wrestling history including Superstar Billy Graham, Fritz Von Erich, Edge, Chris Jericho, Chris Benoit, Christian and his sons Bret Hart and Owen Hart.  All of Stu's eight sons were wrestlers and two of them, Bret and Owen, achieved considerable fame and success in the World Wrestling Federation (WWF, now WWE), with many of the WWF's biggest storylines in the mid-1990s being built around Bret and Owen and their brothers-in-law.

Cináed mac Flainn: Cináed mac Flainn (died 770) was a king of the Uí Failge, a Laigin people of County Offaly.  He was one of the many sons of Fland Dá Chongal, a previous king.  He ruled from 757 to 770.  He was the second of Fland's sons by Érenach, daughter of Murchad Midi (died 715) of Uisnech to hold the throne.

Rakshasa Kingdom: Rakshasa Kingdom refers to the territory of Rakshasas who were a tribe, mentioned along with others like Devas (including Rudras, Maruts, Vasus and Adityas), Asuras (including Daityas, Danavas and Kalakeyas), Pisachas, Gandharvas, Kimpurushas, Vanaras, Suparnas, Kinnaras, Bhutas and Yakshas.  Rakshasas were described to have large bodies, probably due to their continuous life in cold climates over snow-covered mountains.  The forefathers of the famous Rakshasa king Ravana lived along with the Yakshas.  The Yaksha king Vaisravana was the elder brother of Rakshasa king Ravana.  Ravana had many sons among Gandharva wives.  The two epics Mahabharata and Ramayana and many Puranas attest that Rakshasas, Yakshas and Gandharvas were related and had inter-marriages.

Supporting paragraphs: Hart wrestling family Bret Hart
Answer: eight