Last name Ismailjan (Исмаилжан 
, Исмаилян 
, Ismailjan) , all around the world, is a rare cognomen. The cognomen Ismailjan is habitual in Kyrgyzstan, where it is quite a rare surname, Belarus, where it is a very rare surname, and Russia. More frequently, Ismailjan is the forename as well as the last name.