Sayyid (also spelled Syed, Seyd, Sayed, Sayyad, Sayyed, Saiyid, Seyed, Said and Seyyed) (pronounced [səj.jɪd], Arabic: سيد; meaning Mister) (plural Sadah Arabic: سادة, Sāda(h), also spelled Sadat) is an honorific title denoting males accepted as descendants of the Islamic prophet Muhammad through his grandsons, Hasan ibn Ali and Husayn ibn Ali, sons of Muhammad's daughter Fatimah and his son-in-law Ali (Ali ibn Abi Talib).