Last name Айку (Aiku 
, Айку 
) , globally, is a rare family name. The cognomen Айку is characteristic of Nigeria, where it is a rare surname, Kyrgyzstan, where it is a very rare surname, and Georgia. Not in comparison with a country's population, it most frequently occurs in Nigeria, India, and the United States. Likewise, Айку is the forename as well as the last name.