Last name Haimon (Hamlin 
, Haimon 
) , in all the world, is a common cognomen. The surname Haimon is habitual in the United States, where it is quite a rare surname, New Zealand, and Sweden. In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Canada. Much less frequently, Haimon is the forename as well as the last name.