Ahmad Niyaltigin was the treasurer of a sultan who rose to power by seizing what from his younger twin?
Mas'ud I of Ghazni Mas'ud I of Ghazni (Persian: مسعود غزنوی‎ ‎ ), known as Amīr-i Shahīd (امیر شهید ; "the martyr king")(998 – 17 January 1040), was "sultan" of the Ghaznavid Empire from 1030 to 1040. He rose to power by seizing the Ghaznavid throne from his younger twin Mohammad, who had been nominated as the heir upon the death of their father Mahmud of Ghazni. His twin was shortly blinded and imprisoned. However, when much of Mas'ud's western domains had been wrested from his control, his troops rebelled against him and reinstated Mohammad to the throne.
Mansur Shihab Mansur Shihab was the Emir of Mount Lebanon between 1754 and 1770. He and his brother Ahmad took the reins of power from their ailing brother Mulhim Shihab and ruled jointly until Mansur became the sole emir after winning a power struggle with Ahmad in 1763. Mansur aligned himself with Zahir al-Umar and Ali Bey, the autonomous rulers of Palestine and Egypt, respectively, in their rebellion against the Ottomans. Mansur was subsequently forced by the Druze sheikhs of Mount Lebanon to step down in favor his nephew Yusuf Shihab after Zahir and Ali Bey were defeated in 1770.