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All over the world, Kaysa (Kaysa , Кайса ) is quite a rare gender-neutral first name. The first name Kaysa is habitual in Azerbaijan, where it is quite a rare masculine name, Kazakhstan, where it is quite a rare predominantly male, but very infrequently girly name, and Indonesia, where it is a rare gender-neutral name. Very seldom, Kaysa is the last name as well as the forename.
Kaysa is also a name for the fictitious and mythical characters: Kajsa Engström , the fictional character created by Astrid Lindgren and Rajamäkis Kaisa , character in The Seven Brothers.