Most of us had never heard this lovely Welsh name with links to the moon until we heard the 1976 smash hit Fleetwood Mac song of that name, with lyrics by Stevie Nicks. That same year it popped onto the U.S. Top 1000 at Number 593.
After giving his four boys extreme rebel names, director Robert Rodriguez bestowed this sweet name on his first daughter.
According to Celtic legend, Rhiannon's birds sang more sweetly than any others; she herself was known for being forthright and witty.
Rihanna looks similar but is unrelated.