Abdullah bin Thunayan Al Saud (Arabic: عبد الله بن ثنيان آل سعود, romanized: ʿAbd Allāh ibn Ṯunayān Āl Suʿūd; died July 1843) was Emir of Nejd from 1841 to May 1843.
[3] It was at that time that he first came to Hejaz and made several unsuccessful attempts to capture the Emirate of Nejd.
[3] He was also supported by the descendants of Muhammad ibn Abd al-Wahhab and other significant tribal leaders[3] who regarded Khalid bin Saud as an illegitimate ruler due to his alliance with the Egyptians.
[7][11] Abdullah did not endorse the leadership of Faisal and was imprisoned in Al Masmak fortress where he died of poisoning in July 1843.
[5][6][12][13] He was buried in Riyadh following the funeral prayers led by Imam Faisal bin Turki.