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Throughout the world, Halliday (Halliday , Холлидэй) is a rare epicene first name. The first name Halliday is characteristic of Nigeria, where it is a rare gender-neutral name, and the United States, where it is an extremely rare gender-neutral name. Much more frequently, Halliday is the last name as well as the forename.
Halliday is also a name for the fictitious and mythical characters: .