Family name Оига (Oiga 
, Оига 
, Oyga ) , in all the world, is a rare cognomen. The family name Оига is habitual in Philippines, where it is a rare surname, Spain, where it is an extremely rare surname, and Chile. Not in comparison with a country's population, it most frequently occurs in Philippines, the United States, and Nigeria. Much less frequently, Оига is the forename as well as the last name.