Rhiannon
given name · Latin script
Meaning: Welsh origin; possibly from an older Celtic name meaning uncertain, associated with a goddess
Recorded as a female name· opposite-gender records fall within measured source noise
/ɹiənnən/(machine-generated) pronunciation, model-generated
Rhiannon is a given name written in the Latin script, with more bearers in the United States than in any other country.
- AUAustralia≈1 in 4.1K(inferred from the name graph)
- GBUnited Kingdom≈1 in 11K
- USUnited States1 in 26K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- Sources
- 380 (measured from records)
- ≈1 in 4.1K (inferred from the name graph)
12,801 people, 2020
Highest-authority source
Australia, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
Welsh origin; possibly from an older Celtic name meaning uncertain, associated with a goddess.
Sources 1
- Le grand guide des prénoms (Enfant - Education)
Attested across 2 languages in the etymology graph.
Where in the world(measured from records)
Rhiannon counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| US United States | — | 12,801 | 1 in 26K | 13K | Rhiannon | 380 |
| AU Australia | #548 | ≈6,200 est. | ≈1 in 4.1K | 89 | Rhiannon | 182 |
| GB United Kingdom | #777 | ≈5,800 est. | ≈1 in 11K | 6 | Rhiannon | 255 |
| ID Indonesia | — | ≈1,000 est. | ≈1 in 264K | — | Rhiannon | 8 |
| CA Canada | — | ≈830 est. | ≈1 in 46K | 4 | Rhiannon | 134 |
| NZ New Zealand | #778 | ≈220 est. | ≈1 in 22K | 10 | Rhiannon | 93 |
12,801 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: Census Bureau — First Name Frequency 2020 by sex; NSW BDM — Popular baby names (1952–present); NRS — Baby names Scotland full list (1974–present); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; DIA — Baby name popularity (1900–present). Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Other recorded senses(measured from records)
Rhiannon is also recorded in 5 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Welsh, From Rigantona, ‘great queen’; Welsh goddess of the moon and fertility.
as a nameIrish first names
Welsh: name borne in Celtic mythology by a minor deity associated with the moon, and in the Mabinogi by a daughter of Hyfeidd the Old. It is probably derived from the Old Celtic title Rigantona ‘great queen’; it was not used as a given name before the 20th century.
as a nameA concise dictionary of first names
In English, A figure in Welsh mythology.
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In French, Origine galloise, signifie « bonté ».
as a nameLe grand guide des prénoms (Enfant - Education)
In Welsh, A figure in Celtic mythology.
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Rhiannon Ifansb. 1954GBWelsh academic and author
- Rhiannon Giddensb. 1977USAmerican musician (born 1977)
- Rhi Jeffreyb. 1986USnot in their usual nameAmerican swimmer, Olympic gold medalist, world champion
- Claire Holtb. 1988AUnot in their usual nameAustralian actress (born 1988)
- Rhiannon Robertsb. 1990GBWelsh footballer (born 1990)
- Rhiannon Fishb. 1991CACanadian-born Australian actress
- Rhiannon Dennisonb. 1993NZNew Zealand hockey player
- Rhiannon Leigh Wrynb. 2000USAmerican actress
- Elli Rhiannonb. 2001NONorwegian actress
- Rhiannon MoushallAUAustralian voice actress
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
How to address them(machine-generated)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 36 sources across 19 countries.
Reference works 2
- Wikipedia given-name tokens
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- How do you pronounce Rhiannon?
- A machine transcription gives /ɹiənnən/ (IPA) for English.
- Is Rhiannon a male or female name?
- Rhiannon is a female name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- What does the name Rhiannon mean, and where does it come from?
- Welsh origin; possibly from an older Celtic name meaning uncertain, associated with a goddess. Recorded by Le grand guide des prénoms (Enfant - Education).
- What are other forms of the name Rhiannon?
- In the etymology graph, Rhianon, Reannon and Riannon are forms of the same name in other languages.
- In which country does Rhiannon have the most bearers?
- In the United States, the national register counted about 13 thousand people named Rhiannon, more than in any other country we hold, where it is most often spelled rhiannon.
- How common is the name Rhiannon?
- In the United States, the national register counted 12,801 people named Rhiannon in 2020, about 1 in 26 thousand residents.
- How common is Rhiannon compared with other names?
- In Australia, Rhiannon is the 548th most common given name of 205,854 given names recorded there.
What do you want to know about Rhiannon?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/rhiannonThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Rhiannon” — the 548th most common given name in Australia. Data snapshot 2026-10-10.