Family name Kalaidjan (Калайджан 
, Kalaidjan 
) , in all the world, is a rare cognomen. The surname Kalaidjan is habitual in Russia, where it is a rare surname, Ukraine, where it is a very rare surname, and Georgia. Not in comparison with a country's population, it is commonest in Russia, Ukraine, and Netherlands. Much less frequently, Kalaidjan is the forename as well as the last name.