>
Globally, ケラー (Keller , Kollár , Kelleher ) is quite a rare epicene forename. The first name ケラー is habitual in Switzerland, where it is quite a rare epicene name, Guatemala, where it is a rare male name, and Hungary, where it is a rare epicene name. In absolute terms, it is commonest in Brazil, the United States, and Germany. Much more frequently, ケラー is the last name as well as the forename.
ケラー is also a name for the fictitious and mythical characters: Keller frères , the Honoré de Balzac character, Les Petits Bourgeois.