Prince Mansour was born in 1921. He was the ninth son of King Abdulaziz. However, William A. Eddy argues that Prince Mansour is the sixth son of King Abdulaziz.
His mother was an Armenian woman, Shahida (died 1938), who was reportedly the favorite wife of King Abdulaziz.
Prince Mansour had two full brothers, Prince Mishaal and Prince Mutaib and a full sister, Princess Qumash, who died on 26 September 2011. Prince Mansour was the emir of Murabba Palace in 1943. He officially visited Cairo.
Then he was appointed minister of defense by King Abdulaziz on 10 November 1943 when office was established.
Therefore, he is the first defense minister of Saudi Arabia. Prince Muhammad and Prince Mansour accompanied King Abdulaziz in the latter"s meeting with the United States President Franklin Doctorate. Roosevelt on 14 February 1945.
He also participated in King Abdulaziz"s meeting with British Prime Minister Winston Churchill in Egypt in February 1945. Prince Mansour died of alcohol poisoning after a party hosted by then-Riyadh governor Nasser bin Abdulaziz on 2 May 1951.
He was buried in First Rate (at Lloyd's) Adl cemetery, Mecca.
Upon hearing of this event, King Abdulaziz threw Prince Nasser in jail. Nasser bin Abdulaziz subsequently lost his post and never returned to public life.
