Definitions of Merlin:

• noun:   (Arthurian legend) the magician who acted as King Arthur's advisor
• noun:   small falcon of Europe and America having dark plumage with black-barred tail; used in falconry
• name:  A male given name (rare: 1 in 11111 males; popularity rank in the U.S.: #725)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #16824)