Mahmud of Ghazni was known as Yāmīn al-Dawlah Maḥmūd (in full: Yāmīn al-Dawlah Abd al-Qāṣim Maḥmūd Ibn Sebük Tegīn). He was the eldest son of Emir Subuktigin. When he was young, Mahmud helped his father gain land through military campaigns against Turk nobles. In 997, he overthrew his younger brother, Ismail, who had been nominated for the throne after his father’s death. As soon as he had the throne, he went out to conquer territory.