Cognomen Оина (Оина 
, Oyna 
) , all around the world, is a very rare family name. The cognomen Оина is characteristic of Norway, where it is a very rare surname, Turkey, and Nigeria, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Turkey, Nigeria, and China. Also, Оина is the forename as well as the last name.