Last name Каид (Kaid 
, Caid 
, Kayd 
) , throughout the world, is quite a common cognomen. The surname Каид is characteristic of Algeria, where it is quite a common surname, Israel, where it is quite a rare surname, and Morocco. In absolute terms, it is commonest in Northern Africa, particularly Algeria, Egypt, and Morocco. Much less frequently, Каид is the forename as well as the last name.