Family name Джераси (Djerassi 
, Джераси 
) , in the entire world, is a very rare surname. The family name Джераси is habitual in Bulgaria, where it is a rare surname, Ireland, and Israel, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in the United States, Bulgaria, and Ireland. Much less frequently, Джераси is the forename as well as the last name.