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Surname ขวัญวัน (ขวัญวัน , Kamanwan , Khiwwan) , all over the world, is an extremely rare cognomen. Much more prevalently, ขวัญวัน is the forename as well as the last name.
Khenwan, Khwanwan, Kwanvan, and Kwanwan
ธีรสรเดช