Cognomen Sidaya (Sidaya 
) , all over the world, is a rare family name. The surname Sidaya is habitual in Mauritius, where it is quite a rare surname, Philippines, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Philippines, Mauritius, and India. Also, Sidaya is the forename as well as the last name.