Melchior \m(e)-lchior, mel-chior\ as a boy's name is of Polish, Persian and Farsi origin. Likely derived from the Farsi elements "melk", meaning "king", and "quart", meaning "city". From Christian tradition, the name of one of the three wise men, along with Caspar and Balthasar, who brought gifts to the infant Jesus. Opera singer Lauritz Melchior.

Melchior has 4 variant forms: Malchior, Malkior, Melker and Melkior.

For more information, see also the related name Malki.