Emerald

Emerald is the intriguing color and jewel name of the deep green stone treasured as far back as ancient Egypt--it's supposed to open one's heart to wisdom and to love-- which could make for an interesting, unusual name, particularly with the popularity of so many Em-starting names.

Emerald is the birthstone of May, making it extra appropriate for a girl born in that month. Some pleasant associations: the Emerald Isle and the Emerald City.

Esmeralda is the more exotic Spanish version.