Last name Idy (Idy 
, Иди 
) , in all the world, is quite a rare surname. The family name Idy is habitual in Senegal, where it is quite a rare surname, Hong Kong, and Mali, where it is a rare surname. Measured by absolute frequency, the name is most common in Nigeria, Senegal, and Egypt. More frequently, Idy is the forename as well as the last name.