Saud bin Abdelaziz bin Hamad Al Thani
Shaikh Saud bin Abdelaziz bin Hamad bin Abdullah bin Jassim bin Muhammed Al Thani( 1949 in Qatar)
He is the cousin of Qatari ruler Hamad bin Khalifa Al Thani, grandson of Hamad bin Abdullah Al Thani and great- grandson of Abdullah bin Jassim Al Thani.
Estimates of his net worth range from 3- 12 billion USD.
Hamad bin Abdullah Al Thani
Sheikh Hamad bin Abdullah bin Jassim bin Muhammed Al Thani( 1896 – 27 May 1948)
( Arabic: حمد بن عبدالله بن جاسم بن محمد آل ثاني) was an Heir Apparent of the State of Qatar.
Sheikh Hamad was the second son of the second Emir of Qatar, Sheikh Abdullah bin Jassim Al Thani, and also the father of the fifth Emir of Qatar, Sheikh Khalifa bin Hamad Al Thani.
Abdullah bin Jassim Al Thani
Abdullah bin Jassim bin Mohammed Al Thani(" Abdullah bin Jassim bin Mohammed Al Thani"), also known as Sheikh Abdullah bin Jassim Al Thani or Sheikh Abdullah bin Qassim Al Thani, was the Emir of Qatar.
He was born in 1880 in Doha, the capital city and state of Qatar.
He then abdicated in favour of his heir apparent and second son, Sheikh Hamad bin Abdullah Al Thani, in 1940.
Sheikh Hamad died eight years later and Sheikh Abdullah assumed office once again until 1949, when he stepped down from office in favour for his eldest son, Sheikh Ali bin Abdullah Al Thani.
Oil was also discovered for the first time during his rule.
Khalifa bin Hamad Al Thani
Sheikh Khalifa bin Hamad bin Abdullah bin Jassim bin Mohammed Al Thani( 17 September 1932 – 23 October 2016) was the Emir of Qatar from 27 February 1972 until he was deposed by his son Hamad bin Khalifa on 27 June 1995.
He was the grandfather of the current Emir, Tamim bin Hamad Al Thani.
Mohammed bin Abdulrahman bin Jassim Al Thani
Mohammed bin Abdulrahman bin Jassim Al Thani( born 1 November 1980) is a member of Al Thani family, and has been the Deputy Prime Minister and Qatari Minister of Foreign Affairs since 27 January 2016.
Khalid bin Hamad bin Abdullah Al Thani
Khalid bin Hamad bin Abdullah bin Jassim bin Muhammed Al Thani( born 1935 in Doha) is a former Minister of Interior of Qatar, as which he served from 1972 to 1989.
He is the son of Sheikh Hamad bin Abdullah Al Thani and Sheikha Sarah bint Mohammed Al Thani and the grandson of Abdullah bin Jassim Al Thani and Mohammed bin Jassim Al Thani.
After the coup of 1972 his half- brother Sheikh Khalifa bin Hamad Al Thani appointed him as the Minister of the Interior.
Jassim bin Muhammed bin Jassim Al Thani
HH Shiekh Jassim bin Muhammed bin Jassim bin Muhammed Al Thani is a member of the Qatari royal family who was the founder and minister of electricity and water from 1970 to 1989.
He was born in 1914 in Umm Salal, eldest son of Shiekh Mohammed bin Jassim Al Thani and Her Highness Sheikha Aisha bint Ahmed Al Thani.
He married six times.
Suhaim bin Hamad Al Thani
Suhaim bin Hamad bin Abdullah bin Jassim bin Muhammed Al Thani( 1933- 21 August 1985) was a member of the ruling family of Qatar who served as the country's foreign minister.
His brother, Khalifa bin Hamad Al Thani, was the emir of Qatar.
Khalifa bin Jassim Al Thani
Sheikh Khalifa bin Jassim bin Muhammed bin Jassim bin Muhammed Al Thani (born 1959) is the chairman since 2014 of the Federation of the GCC Chambers of Commerce and Industry.
He is a member of the Qatari royal family and businessman.
He is the ninth son of Sheikh Jassim bin Muhammed bin Jassim Al Thani, the Minister of Electricity and Water from 1970 to 1989.
Ahmed bin Jassim Al Thani
Ahmed bin Jassim Al Thani( Arabic: أحمد بن جاسم آل ثاني) is a Qatari businessman, politician and a member of the royal family, Al Thani.

Question: Who is the paternal grandfather of Khalifa Bin Jassim Al Thani?
Answer: Mohammed bin Jassim Al Thani