Definitions of Melchior:

• noun:   (New Testament) one of the three sages from the east who came bearing gifts for the infant Jesus; usually represented as a king of Nubia
• noun:   United States operatic tenor (born in Denmark) noted for his Wagnerian roles (1890-1973)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #14545)