Rhianon
- US rank
- Unranked
- Syllables
- 2
- Peak
- #3,098 in 1978
0 babies were named Rhianon in the US in 2025.
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US births per million girls, 1976–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Rhianon you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryRhianon first shows up in US birth records in 1976, the first year at least 5 babies got it. It has been in use for 49 years since.
- Best yearIts best year was 1978, when it reached #3,098.
About the name Rhianon
Rhianon is a girl name of Welsh origin. It has 7 letters and 2 syllables, starting with R and ending in “-non”. US birth records list Rhianon for girls from 1976 to 2008, in 31 of those 33 years. Its best year was 1978, when it ranked #3,098 among girl names. It hasn't been given to 5 or more US babies in a year since 2008, so today it's a genuinely rare choice.
Origin:Welsh names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1970s | 8.8 | 113,636 girls |
| 1980s | 8.3 | 120,773 girls |
| 1990s | 5.7 | 175,131 girls |
| 2000s | 3.4 | 295,082 girls |
Other spellings of Rhianon
More Welsh girl names
- Girl name: Cecilia · blind
- Unisex name: Reese · ardor, enthusiasm
- Girl name: Arianna · most holy
- Unisex name: Rowan · little red-haired one
- Unisex name: Morgan · possibly sea circle
- Girl name: Sabrina · River Severn
- Unisex name: Teagan · possibly poet
- Girl name: Gwendolyn · white ring
Questions about the name Rhianon
What is the origin of the name Rhianon?
Rhianon has Welsh roots in our records. Other Welsh names include Cecilia, Reese, Arianna.
Is Rhianon a boy or girl name?
Rhianon is a girl name.
How popular is the name Rhianon?
Rhianon is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 2008. It peaked at #3,098 in 1978.