All over the world, Исаг (Isag 
, Исаг 
, Ysag 
) is a rare predominantly male, but scarcely feminine first name. The first name Исаг is characteristic of Indonesia, where it is a very rare boy's name, Russia, and Nigeria, where it is an extremely rare gender-neutral name. Measured by absolute frequency, the name is most common in Indonesia, India, and Nigeria. Also, Исаг is the last name as well as the forename.