Question: Who was the son of one of King Abdulaziz many spouses who's brother  is King of Saudi Arabia, Custodian of the Two Holy Mosques, and head of the House of Saud ?
Sentence (from "Salman of Saudi Arabia"): Salman bin Abdulaziz Al Saud (Arabic: ‎ ‎ , "Salmān ibn ‘Abd al-‘Azīz Āl Sa‘ūd "; born 31 December 1935) is King of Saudi Arabia, Custodian of the Two Holy Mosques, and head of the House of Saud.
Relevant evidence: Yes