Definitions of merry:

• adjective:   quick and energetic

  Example: "A merry chase"

• adjective:   offering fun and gaiety

  Example: "A merry evening"

• adjective:   full of or showing high-spirited merriment

  Example: "Have a merry Christmas"

• name:  A female given name (rare: 1 in 14285 females; popularity rank in the U.S.: #1152)
• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6743)