"Sayyid (also spelled \"Seyd\", \"Syed\", \"Sayed\", \"Sayyed\", \"Saiyid\", \"Seyed\" and \"Seyyed\") (pronounced [\u02C8s\u00E6jj\u026Ad], or [\u02C8s\u00E6jjed], Arabic: \u0633\u064A\u062F\u200E; meaning Mister) (plural Sadah Arabic: \u0633\u0627\u062F\u0629\u200E, S\u0101da(h)) 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). Conventionally, descent is patrilineal."@en . . . . . .