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Family name Declan (Declan , Деклан , דקלן ) , all around the world, is quite a rare last name. The last name Declan is habitual in Ireland, where it is quite a rare surname, Ghana, where it is a rare surname, and Malaysia. Measured by absolute frequency, it most frequently occurs in Nigeria, Ghana, and Malaysia. More frequently, Declan is the forename as well as the last name.
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