Cognomen Khaida (Khaida 
, Хайда 
) , all over the world, is a rare surname. The cognomen Khaida is characteristic of Mauritania, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Morocco. Not in comparison with a country's population, it is commonest in Mauritania, France, and Morocco. Also, Khaida is the forename as well as the last name.