Seyyed Masoud Hosseini Khamenei (Persian: سید مسعود حسینی خامنه‌ای), commonly known as "Seyyed Masoud Khamenei" (and also known as "Seyyed Mohsen Khamenei" [Persian: سید محسن خامنه‌ای]) is an Iranian Twelver Shia cleric who is the third son of Iran’s supreme leader, Seyyed Ali Khamenei; and is the brother of Seyyed Mostafa, Seyyed Mojtaba and Seyyed Meitham.