Family name Резаи (Rezaei 
, Rezai , Rezay 
) , worldwide, is a common last name. The cognomen Резаи is characteristic of Iran, where it is quite a common surname, Afghanistan, and Sweden, where it is quite a rare surname. In absolute terms, it is commonest in Iran, Afghanistan, and the United States. Very seldom, Резаи is the forename as well as the last name.