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In the entire world, Llewellyn (Llewellyn , Llywelyn ) is quite a common principally male, but very seldom female first name. The given name Llewellyn is characteristic of South Africa, where it is quite a rare male name, Jamaica, and Australia, where it is a rare largely masculine, but seldom female name. Measured by absolute frequency, the name is most common in South Africa, the United States, and the United Kingdom. Also, Llewellyn is the last name as well as the forename.
Llewellyn is also a name for the fictitious and mythical characters: .