Family name Каиро (Cairo 
, Каиро 
) , in the entire world, is a common cognomen. The cognomen Каиро is habitual in Suriname, where it is a common surname, Uruguay, where it is quite a rare surname, and Egypt. Measured by absolute frequency, it is commonest in Egypt, Italy, and Argentina. Much less frequently, Каиро is the forename as well as the last name.