Family name Yskov (Yskov 
, Исков 
) , in the world, is a rare surname. The cognomen Yskov is characteristic of Bulgaria, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, it is the most numerous in Russia, Bulgaria, and China. Much less frequently, Yskov is the forename as well as the last name.