Family name Jigai (Jigai 
, Жигай 
) , in the world, is a rare last name. The family name Jigai is habitual in Ukraine, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Georgia. In absolute terms, it is the most numerous in Ukraine, Russia, and Nigeria. Much less frequently, Jigai is the forename as well as the last name.