Surname Mordejai (מרדכי 
, مردخاي 
, Мордехай 
) , globally, is quite a rare cognomen. The cognomen Mordejai is characteristic of Israel, where it is quite a common surname, Russia, where it is a very rare surname, and Mexico, where it is an extremely rare surname. More prevalently, Mordejai is the forename as well as the last name.