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Last name Bilong (必龙 , Bilong , 碧龙 ) , all around the world, is quite a common surname. The surname Bilong is characteristic of Cameroon, where it is quite a common surname, Gabon, where it is quite a rare surname, and Malaysia. In absolute terms, it most frequently occurs in Cameroon, China, and Malaysia. Also, Bilong is the forename as well as the last name.