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Around the world, Kaster (Kaster , Кастер , كاستر ) is a rare largely masculine, but infrequently feminine given name. The forename Kaster is habitual in Kazakhstan, where it is a rare gender-neutral name, Saudi Arabia, where it is a very rare boy's name, and Philippines, where it is an extremely rare masculine name. In absolute terms, this name is the most popular in Kazakhstan, India, and Saudi Arabia. More prevalently, Kaster is the last name as well as the forename.
Kaster is also a name for the fictitious and mythical characters: .