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Cognomen ลูกจันทร์ (ลูกจันทร์ , Lukjan , Lukchan ) , worldwide, is a rare family name. The family name ลูกจันทร์ is characteristic of Thailand, where it is a rare surname, Latvia, and the United States, where it is an extremely rare surname. More prevalently, ลูกจันทร์ is the forename as well as the last name.