Feminine dossier · first seen 1974
Rhiannon
Resurgent
Gaining cultural share
Peak era
1999
Peak births
651
Current vitality
Fragile
Peak generation
Gen Z
Quick answers about Rhiannon
How many people are named Rhiannon?
An estimated 15,085 living Americans are named Rhiannon.
How rare is Rhiannon?
Rhiannon is uncommon among babies today, with 210 girls receiving the name in 2025, down 67.7% from its 1999 peak.
How old is the typical Rhiannon?
The median age of a living American named Rhiannon is approximately 28 years, with most bearers falling between 20 and 40 years old.
Is Rhiannon still popular?
Yes — Rhiannon is currently rising in popularity, with 210 births in 2025.
Where is Rhiannon most common?
Rhiannon has its strongest geographic signal in New Mexico, where it appears 3.8× more often than the national baseline.
1974Peak 19992025
Peak year
1999
Decline from peak
67.7%
2025
210
All-time
15,539
Where it lives now
Rhiannon is most concentrated in New Mexico — about 3.8× the national rate in the 2000s.
States where Rhiannon is given more often than the national average — its present-day heartland.