King Abdul-Aziz of Saudi Arabia (1876 – 9 November 1953) (Arabic: عبد العزيز آل سعود‎ ‘Abd al-‘Azīz Āl Su‘ūd) was the first monarch of Saudi Arabia, the third Saudi State. He was usually called Ibn Saud in English-speaking countries.

Beginning with the reconquest of his family's ancestral home city of Riyadh in 1902, he consolidated his control over the Najd in 1922, then conquered the Hijaz in 1925. Having conquered almost all of central Arabia, he united his dominions into the Kingdom of Saudi Arabia in 1932. As King, he presided over the discovery of petroleum in Saudi Arabia in 1938 and the beginning of large-scale oil exploitation after World War II. He was the father of many children having 45 sons, including all of the subsequent kings of Saudi Arabia.

Abdul-Aziz was born in 1876 in Riyadh, in the region of Najd in central Arabia.

In 1890, the Al Rashid conquered Riyadh. Abdul-Aziz was 15 at the time. He and his family initially took refuge with the Al-Murrah, a Bedouin tribe in the southern desert of Saudi Arabia. Later, the Al Sauds moved to Kuwait.

Saud bin Abdul-Aziz Al Saud (January 12, 1902 – February 23, 1969) (Arabic: سعود بن عبد العزيز آل سعود‎ Su‘ūd ibn ‘Abd al-‘Azīz Āl Su‘ūd) was King of Saudi Arabia from 1953 to 1964. He was removed from power by Faisal because of his alleged mismanagement and waste. He became Crown Prince in 1933 and died in exile in Greece.

Saud was born in 1902 in Kuwait and is the second son of Ibn Saud. He was born in the home of Amir Abdul Rahman bin Faisal. They were in district Sakkat Anaza where the family of the was staying after their exile from Riyadh. After his father Abdulaziz conquered Riyadh in 1902, Saud followed him with his mother and brothers.

Saud had one full brother, Turki (al Awwal; the first). Their mother was Wadhah bint Muhammad bin 'Aqab, who belonged to the Qahtan tribe.

When he was five years old, his father took him to Sheikh Abdul Rahman Mufaireej. He was taught sharia and the Qur'an. He also learned archery and horse-riding. He had smallpox, but Abdul-Aziz made Saud attend the meetings that he held in order to learn and develop political skills. Moreover, Saud was very close to his father, so much that when he died Saud said "I lost my father…and my friend".