Ratchasakun

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Ratchasakun (Thai: ราชสกุล) refers to the surnames indicating royal descent from a Thai monarch of the Chakri Dynasty, first established in 1912 after King Rama VI enacted a series of laws granting surnames to the Thai people, with the laws expressly stating that all Thai citizens must have a "surname" indicating who they are related to, or whom they are descended from,^[1] with those who are direct members of the royal bloodlines to be called ratchasakun, those who have marital ties to the royal family to be referred to as ratchanikun (ราชนิกุล), and those descended from a Chakri Front Palace to be called bowon ratchasakun (บวรราชสกุล).