Question: What family does the ruling king of Saudi Arabia come from?

full_context: Document 1: Prince Abdulaziz bin Salman bin Muhammad Al Saud: Prince Abdulaziz bin Salman bin Mohammed Al Saud (Arabic:الأمير عبد العزيز بن سلمان بن محمد آل سعود), (born 8 August 1959, Riyadh Saudi Arabia) is a member of Saudi Royal Family. Prince Abdulaziz is reported to be third son of Prince Salman Bin Mohammed Al Saud.
Document 2: Saud bin Abdulaziz bin Nasser Al Saud: Saud bin Abdulaziz bin Nasser Al Saud (, born 1977) is a member of the Saudi royal family and a convicted murderer. He is a distaff grandson of King Abdullah.
Document 3: Nasser bin Abdulaziz Al Saud: Nasser bin Abdulaziz Al Saud (1911 – 15 September 1984) was one of the former Riyadh governors and a member of House of Saud.
Document 4: Turki bin Mohamed bin Fahd Al Saud: Turki bin Mohamed bin Fahd Al Saud (born 5 October 1979 in Riyadh, Saudi Arabia) is the eldest son of Prince Mohamed bin Fahd bin Saud, the eldest surviving son of the late King Fahd who was former governor of the Eastern Provinces and Jawahir bint Nayef, sister of the one time Crown Prince Muhammad bin Nayef. He is the grandnephew of King Salman, the current King of Saudi Arabia.
Document 5: Succession to the British throne: Queen Elizabeth II is the sovereign, and her heir apparent is her eldest son, Charles, Prince of Wales. Next in line after him is Prince William, Duke of Cambridge, the Prince of Wales's elder son. Third in line is Prince George, the eldest child of the Duke of Cambridge, followed by his sister, Princess Charlotte and younger brother, Prince Louis. Sixth in line is Prince Harry, Duke of Sussex, the younger son of the Prince of Wales. Under the Perth Agreement, which came into effect in 2015, only the first six in line of succession require the sovereign's consent before they marry; without such consent, they and their children would be disqualified from succession.
Document 6: King of Saudi Arabia: King of Saudi Arabia ملك المملكة العربية السعودية Royal Standard of Saudi Arabia Incumbent Salman since 23 January 2015 Details Heir apparent Mohammad bin Salman First monarch Ibn Saud Formation 22 September 1932 Residence King's Palace
Document 7: Mansour bin Abdulaziz Al Saud: Mansour bin Abdulaziz Al Saud (1921 – 2 May 1951) (Arabic: منصور بن عبد العزيز آل سعود) was the first defense minister of Saudi Arabia and a member of Saudi royal family, House of Saud.
Document 8: Muhammad bin Abdul-Rahman: Muhammad bin Abdul-Rahman (1882 – 25 July 1943) was a son of Abdul-Rahman bin Faisal, Imam of the Second Saudi State based in Riyadh. Muhammad was an early supporter of his own brother King Abdulaziz. However, Muhammad and Abdulaziz had a falling-out after both attempted to place their respective sons in line for kingship. This conflict may have led to the death of Muhammad's son Khalid. Muhammad later became a virtual non-entity in Saudi politics.
Document 9: Prince Sultan bin Abdul Aziz Stadium: Prince Sultan bin Abdul Aziz Stadium is a multi-use stadium in Abha, Saudi Arabia. It is currently used mostly for football matches and is the home stadium of Abha. The stadium has a capacity of 20,000 people.
Document 10: Fahd of Saudi Arabia: Fahd bin Abdulaziz Al Saud, Custodian of the Two Holy Mosques (Arabic: فهد بن عبد العزيز آل سعود‎ Fahd ibn ‘Abd al-‘Azīz Āl Sa‘ūd; 1921 – 1 August 2005) was King of Saudi Arabia from 1982 to 2005. He was one of 45 sons of Saudi founder Ibn Saud and the fourth of his six sons who were kings (Saud, Faisal, Khalid, Fahd, Abdullah and Salman).
Document 11: Succession to the British throne: Queen Elizabeth II is the sovereign, and her heir apparent is her eldest son, Charles, Prince of Wales. Next in line after him is Prince William, Duke of Cambridge, the Prince of Wales's elder son. Third in line is Prince George, the eldest child of the Duke of Cambridge, followed by his sister, Princess Charlotte and younger brother, Prince Louis. Sixth in line is Prince Harry, Duke of Sussex, the younger son of the Prince of Wales. Any of the first six in line marrying without the sovereign's consent would be disqualified from succession.
Document 12: Saudi Arabia: The area of modern - day Saudi Arabia formerly consisted of four distinct regions: Hejaz, Najd and parts of Eastern Arabia (Al - Ahsa) and Southern Arabia ('Asir). The Kingdom of Saudi Arabia was founded in 1932 by Ibn Saud. He united the four regions into a single state through a series of conquests beginning in 1902 with the capture of Riyadh, the ancestral home of his family, the House of Saud. Saudi Arabia has since been an absolute monarchy, effectively a hereditary dictatorship governed along Islamic lines. The ultraconservative Wahhabi religious movement within Sunni Islam has been called ``the predominant feature of Saudi culture '', with its global spread largely financed by the oil and gas trade. Saudi Arabia is sometimes called`` the Land of the Two Holy Mosques'' in reference to Al - Masjid al - Haram (in Mecca) and Al - Masjid an - Nabawi (in Medina), the two holiest places in Islam. As of 2013, the state had a total population of 28.7 million, of which 20 million were Saudi nationals and 8 million were foreigners. As of 2017, the population is 33 million. The state's official language is Arabic.
Document 13: King of Saudi Arabia: Name Lifespan Reign start Reign end Notes Family Image Ibn Saud Ibn Saud عبد العزيز (1875 - 01 - 15) 15 January 1875 -- 9 November 1953 (1953 - 11 - 09) (aged 78) 22 September 1932 (age 57) 9 November 1953 (Died) Reign established by conquest Saud Saud سعود (1902 - 01 - 12) 12 January 1902 -- 23 February 1969 (1969 - 02 - 23) (aged 67) 9 November 1953 (age 51) 2 November 1964 (Deposed) Son of Ibn Saud and Wadhah bint Muhammad bin 'Aqab Saud Faisal فيصل (1906 - 04 - 14) 14 April 1906 -- 25 March 1975 (1975 - 03 - 25) (aged 68) 2 November 1964 (age 57) 25 March 1975 (Assassinated) Son of Ibn Saud and Tarfa bint Abduallah bin Abdulateef al Sheekh Saud Khalid خالد (1913 - 02 - 13) 13 February 1913 -- 13 June 1982 (1982 - 06 - 13) (aged 69) 25 March 1975 (age 62) 13 June 1982 (Died) Son of Ibn Saud and Al Jawhara bint Musaed bin Jiluwi Saud Fahd فهد 1921 -- 1 August 2005 (aged 84) 13 June 1982 (age 61) 1 August 2005 (Died) Son of Ibn Saud and Hussa bint Ahmed Al Sudairi Saud Abdullah عبد الله (1924 - 08 - 01) 1 August 1924 -- 23 January 2015 (2015 - 01 - 23) (aged 90) 1 August 2005 (age 81) 23 January 2015 (Died) Son of Ibn Saud and Fahda bint Asi Al Shuraim Saud Salman سلمان (1935 - 12 - 31) 31 December 1935 (age 82) 23 January 2015 (age 79) Incumbent Son of Ibn Saud and Hussa bint Ahmed Al Sudairi Saud
Document 14: Muqrin bin Abdulaziz: Muqrin bin Abdulaziz Al Saud (; born 15 September 1945) is a member of House of Saud who served as Crown Prince of Saudi Arabia from January to April 2015. He was Director General of Al Mukhabarat Al A'amah (Saudi Intelligence Agency) from 2005 to 2012. In July 2012, Muqrin was appointed King Abdullah's Advisor and Special Envoy with the rank of minister. On 1 February 2013, King Abdullah named him as Second Deputy Prime Minister, being the fifth Saudi royal to hold this position. This post was previously held by King Fahd, King Abdullah, Crown Prince Sultan, and Crown Prince Nayef. On 27 March 2014, he was named Deputy Crown Prince making him second in the line of succession behind his brother Salman bin Abdulaziz Al Saud. On 23 January 2015, upon King Abdullah's death and the accession of King Salman, Muqrin became Crown Prince and First Deputy Prime Minister. Only three months later, on 29 April 2015, King Salman replaced Prince Muqrin with Prince Muhammad bin Nayef as Crown Prince.
Document 15: King of Saudi Arabia: The kings since Ibn Saud's death have all been his sons, and all likely immediate successors to the reigning King Salman will be from his progeny. Sons of Ibn Saud are considered to have primary claim on the throne of Saudi Arabia. This makes the Saudi monarchy quite distinct from Western monarchies, which usually feature large, clearly defined royal families and orders of succession. The current Crown Prince is the first grandson of Ibn Saud to be in the line of succession.
ground_truth: Al Saud
sub_queries: who is the ruling king of saudi arabia Answer: Salman
Salman of Saudi Arabia >> family Answer: Al Saud