Family name Gajdar (Гайдар 
, Gajdar 
, Тимурович ) , worldwide, is quite a rare surname. The cognomen Gajdar is characteristic of Ukraine, where it is quite a rare surname, Slovakia, and Kazakhstan. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Ukraine, Russia, and Slovakia. Also, Gajdar is the forename as well as the last name.