Rhiannan
- US rank
- Unranked
- Syllables
- 2
- Peak
- #6,719 in 1998
0 babies were named Rhiannan in the US in 2025.
Save adds it to your list. Vote moves it up the top voted names.
US births per million girls, 1978–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Rhiannan you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryRhiannan first shows up in US birth records in 1978, the first year at least 5 babies got it. It has been in use for 47 years since.
- Best yearIts best year was 1998, when it reached #6,719.
About the name Rhiannan
Rhiannan is a girl name of Welsh origin. It has 8 letters and 2 syllables, starting with R and ending in “-nan”. US birth records list Rhiannan for girls from 1978 to 2009, in 24 of those 32 years. Its best year was 1998, when it ranked #6,719 among girl names. It hasn't been given to 5 or more US babies in a year since 2009, so today it's a genuinely rare choice.
Origin:Welsh names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1970s | 2.3 | 434,783 girls |
| 1980s | 2.1 | 480,769 girls |
| 1990s | 3.9 | 258,398 girls |
| 2000s | 3.2 | 317,460 girls |
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 Rhiannan
What is the origin of the name Rhiannan?
Rhiannan has Welsh roots in our records. Other Welsh names include Cecilia, Reese, Arianna.
Is Rhiannan a boy or girl name?
Rhiannan is a girl name.
How popular is the name Rhiannan?
Rhiannan is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 2009. It peaked at #6,719 in 1998.