From the experts:
Aura has an otherworldly, slightly New Age-y glow, but is beginning to sound more more like a legitimate name. In Greek mythology, Aura was the Titan of the breeze and the fresh, cool air of early morning. But at odds with her peaceful, well, aura, the mythological Aura is a tragic figure, ultimately transformed into a fountain by Zeus.
At the end of the nineteenth century, Aura was not that unusual: she reached Number 511 on the Social Security list in 1882. Princess Aura was a character in the old comic strip Flash Gordon.
Aura is currently popular in some areas of Central America.
Aura alternatives for those who like the name's sound but want to temper the spiritual feel: Auria, Aurora, Aurelia.