Riannon
Riannon is a Welsh girl name. Welsh names often come from medieval legend and poetry, which gives them a romantic, storybook feel. It sounds crisp and confident, it's simple to spell and say, and it pairs well with middle names of almost any length.
Did you know?
- Hidden namesLook closely: Riannon has the name Ian hiding inside it.
- GenerationRiannon peaked in 1982, which makes it a Millennial name. The typical Riannon you'd meet today is about 43 years old.
- HistoryRiannon first shows up in US birth records in 1977, the first year at least 5 babies got it. It has been in use for 48 years since.
US births per million girls, 1977–2025
Similar names
Save adds it to your list. Vote moves it up the top voted names.
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
About the name Riannon
Riannon is a girl name of Welsh origin. Its two syllables give it an easy rhythm, and the consonant at the end gives it a confident finish. It hit its peak in the 1980s, so it feels familiar without being trendy. It's rarely heard today, so it stands out while still being a real, established name.
Origin:Welsh names
Other spellings of Riannon
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 Riannon
What is the origin of the name Riannon?
Riannon is Welsh in origin. Other Welsh names to consider are Cecilia (“blind”), Reese (“ardor, enthusiasm”), Arianna (“most holy”) and Rowan (“little red-haired one”).
Is Riannon a boy or girl name?
Riannon is a girl name.
How popular is the name Riannon?
Riannon is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 2006. It peaked at #5,209 in 1982, so it's a name with history that few kids share today.
What names are similar to Riannon?
If you like Riannon, you might also like Rianon. Rianon is another spelling of the same name.
What should I know before naming my baby Riannon?
Riannon is a Welsh girl name. Welsh names often come from medieval legend and poetry, which gives them a romantic, storybook feel. It sounds crisp and confident, it's simple to spell and say, and it pairs well with middle names of almost any length. Say it out loud with your last name and any middle names you're considering, and check the initials it makes.