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Family name รัตติกาญจน์ (Rattikan , รัตติกาญจน์ , Rarttikarn ) , around the world, is a very rare cognomen. The cognomen รัตติกาญจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia. Predominantly, รัตติกาญจน์ is the forename as well as the last name.