Last name Shigai (Шигай 
, Shigai 
) , across the world, is a rare cognomen. The last name Shigai is habitual in Ukraine, where it is a rare surname, Kyrgyzstan, and Kazakhstan, where it is a very rare surname. In absolute terms, it is the most numerous in Ukraine, Russia, and India. Much less frequently, Shigai is the forename as well as the last name.