Sadat (Arabic: سادات) is a suffix, which is given to families[clarification needed] believed to be descendants of the Islamic prophet, Muhammad. In Iran, after the revolution, it is mandatory to mention "Seyed" or "Sadat" in the names of seyeds or sadats whose descent from Muhammad has been mentioned in ID cards of their fathers or parental grandfathers.[1]
It can also be a given name in some countries.