Family name Idaya (Idaya 
, Идая 
) , in all the world, is quite a rare surname. The family name Idaya is habitual in Nigeria, where it is quite a rare surname, Kenya, where it is a rare surname, and Saudi Arabia, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Nigeria, India, and Kenya. Also, Idaya is the forename as well as the last name.