Surname Kaby (Каби 
, Kaby 
, Кабий ) , across the world, is a rare cognomen. The cognomen Kaby is habitual in Algeria, where it is a rare surname, Saudi Arabia, and Ivory Coast. Measured by absolute frequency, the name is most common in Algeria, the Democratic Republic of the Congo, and Saudi Arabia. Also, Kaby is the forename as well as the last name.