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.
Abu Sa'id Uthman II Abu Sa'id Uthman II (Arabic: أبو سعيد عبد الله عثمان بن يوسف ابو يعقوب‎ ‎ ; Abū Sa'īd 'Abdullāh 'Uthmān ibn Yūsuf Abū Ya'qūb; ] ) (December 1276 - August 1331) was the 10th Marinid sultan of Morocco, reigning from 1310 to 1331. A younger son of Yūsuf Abū Ya'qūb, Abū Sa'īd 'Uthmān succeeded his nephew Abū al-Rabï' Sulaymān as Sultan of Morocco in November 1310, at the age of 33.