Throughout the world, Isag (Isag 
, Исаг 
) is a rare predominantly male, but very infrequently female given name. The first name Isag is characteristic of Indonesia, where it is a very rare masculine name, Russia, and Nigeria, where it is an extremely rare epicene name. Not in comparison with a country's population, it is commonest in Indonesia, India, and Nigeria. Likewise, Isag is the last name as well as the forename.