Definitions of myrtle:

• noun:   widely cultivated as a groundcover for its dark green shiny leaves and usually blue-violet flowers
• noun:   any evergreen shrub or tree of the genus Myrtus
• name:  A female given name (common: 1 in 1282 females; popularity rank in the U.S.: #258)
• name:  A surname (very rare: popularity rank in the U.S.: #80712)