Surname Keyko (Keyko 
, Кеико 
, Кейко 
) , all over the world, is a rare cognomen. The last name Keyko is habitual in Belarus, where it is quite a rare surname, Indonesia, where it is a rare surname, and Ukraine, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Indonesia, Belarus, and Russia. Also, Keyko is the forename as well as the last name.