Surname Kation (Kation 
, Cation 
) , around the world, is a rare cognomen. The last name Kation is habitual in Canada, where it is a rare surname, Australia, and the United Kingdom, where it is a very rare surname. In absolute terms, it is commonest in the United States, Canada, and the United Kingdom. Very seldom, Kation is the forename as well as the last name.