What is the name of Hassan Khomeini's grandfather
Ruhollah Khomeini Sayyid Ruhollah Mūsavi Khomeini (Persian: سید روح‌الله موسوی خمینی‎ ‎ ] ; 24 September 1902 – 3 June 1989), known in the Western world as Ayatollah Khomeini, was an Iranian Shia Muslim religious leader, philosopher, revolutionary, and politician. He was the founder of the Islamic Republic of Iran and the leader of the 1979 Iranian Revolution that saw the overthrow of the 2500 years of Persian monarchy and Mohammad Reza Pahlavi, the last Shah of Iran. Following the revolution, Khomeini became the country's Supreme Leader, a position created in the constitution of the Islamic Republic as the highest-ranking political and religious authority of the nation, which he held until his death. He was succeeded by Ali Khamenei on 4 June 1989.
Mehdi Araghi Mahdi Iraqi (1930 – 26 August 1979) (Persian: مهدی عراقی‎ ‎ ) was a founder of Fadayan-e Islam. He and a friend had participated in Hassan-Ali Mansur's terror, and he was kept in prison during the Shah's regime until the Iranian Revolution. After the revolution he was in charge of Qasr Prison, the prison from which he had recently been freed. He was assassinated by the Forghan group on 13 August 1979.