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Last name Melchior (Melchior , Мельхиор , מלכיאור ) , around the globe, is a common family name. The last name Melchior is characteristic of Luxembourg, where it is quite a common surname, Denmark, where it is quite a rare surname, and Belgium. In absolute terms, it is commonest in Germany, Brazil, and the United States. Also, Melchior is the forename as well as the last name.