In all the world, Idaya (Idaya 
, Идая 
) is quite a common unisex first name. The first name Idaya is characteristic of Tanzania, where it is quite a rare female name, Nigeria, where it is a rare predominantly feminine, but very infrequently boy's name, and Russia, where it is a rare female name. Measured by absolute frequency, it is the most numerous in India, Nigeria, and Tanzania. Likewise, Idaya is the last name as well as the forename.