How Many People Are Named Rhiannon?
people named Rhiannon are alive in the United States today (estimate)
About 1 in 22,441 people in the US has this name
Based on 15,544 babies named Rhiannon in Social Security records from 1974 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎 Rare
Peak Year
651 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Probably derived from the old Celtic name Rigantona meaning "great queen". It is speculated that this was the name of an otherwise unattested Celtic goddess of fertility and the moon. The name Rhiannon appears later in Welsh legend in the Mabinogion, borne by the wife of Pwyll and the mother of Pryderi.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Rhiannon in the records were girls.
👥 Age Distribution
The average person named Rhiannon alive today is about 28 years old, and 56% are under 30. Half of them were between 20 and 39 in 2025.
📈 Popularity Over Time
Rhiannon first appears in the records in 1974 and was given most often in 1999, to 651 babies. In 2025, 210 babies got the name.
Babies given the name each year, 1974 to 2025
🏆 Rank History
Rhiannon has never been one of the 100 most popular girls' names. Its best rank was #418, in 1977. In 2025 it ranked #1,119.
| Girls | |
|---|---|
| Rank in 2025 | #1,119 |
| Best rank | #418 (1977) |
| Years in the top 100 | None |
| Rank in its biggest decade | #678 in the 2000s |
📍 State-Wise Distribution
People named Rhiannon alive today, by the state where they were born (estimate; state records start in 1910).
More people named Rhiannon were born in California than in any other state: about 1,870 of those alive today. Compared with the national rate in the same years, Rhiannon was given 3.6 times as often in New Mexico, 2.2 times in Colorado and 2 times in Arizona.
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