Surname Mordekhay (Mordekhay 
, Мордехай 
) , worldwide, is a very rare cognomen. The last name Mordekhay is characteristic of Israel, where it is a very rare surname, Russia, and Chile, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Russia, the United States, and Mexico. Also, Mordekhay is the forename as well as the last name.