Abdallah bin Jiluwi was the grandson of the founder of the Second Saudi State, Turki bin Abdallah. In his youth he was cousin and a close companion of the young Amir Abd al-Aziz, founder of the modern state of Saudi Arabia, accompanying him in exile to Kuwait after the family's retreat from their capital at Riyadh. Bin Jiluwi was a principal supporter in the raid on the Masmak Castle in 1902 which resulted in the recovery of the city. It was he who killed Ajlan, the Rashidi governor, and saved the life of Abd al-Aziz in the battle for the fortress. As the Saudi state expanded, he was appointed governor of Al Qasim and in 1913 became governor of al-Hasa province. The province was ruled sternly and became almost a semi-independent family fiefdom. Abdallah's son Saud succeeded as governor upon his death in 1938, and others of the family since then have occupied important government posts.