Surname Айду (Aidu 
, Aydu 
, Айду 
) , in the world, is a rare last name. The family name Айду is characteristic of Estonia, where it is a rare surname, Turkey, where it is a very rare surname, and India. In absolute terms, the name is most common in India, Indonesia, and Nigeria. Also, Айду is the forename as well as the last name.