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Rhianon

Girls' name

Variant of Rhiannon

Rhianon has been given to 355 babies in the U.S. since 1976. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1978, with 25 recorded.

Babies named Rhianon, 2008

1 in 562,000

Rhianon over time, 1880–2025

Girls
010203018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Rhianon: meaning, origin, and history

Variant of Rhiannon

Deeper origin not confirmed in the cited records

What Rhianon means

Rhianon is a variant of Rhiannon.

Documented naming usage and pronunciation

Rhianon is used in Welsh.

Another recorded pronunciation is /r̥ɪ.ˈan.ɔn/ for Rhianon.

Meaning behind the documented name family

The name developed through Rhianon → Rhiannon. The family’s proposed meaning is “great queen”, recorded in the naming reference for Rhiannon.

Related names and everyday forms

Related names include Rhiannon.

American usage and historical context

In the United States, 355 girls were recorded with the name Rhianon between 1976 and 2008. Its highest annual count was 25 in 1978; its best national rank was #3,172 in 1978.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

How common is Rhianon?

Rhianon had fewer than 5 recorded uses in 2025, so these figures use 2008, the last year it was published.

Among all babies, 2008
1 in 562,000
7 of 3,930,727 births
Among girls only
1 in 270,000
<0.01% of girls
Rank, 2008
Unranked
Fewer than 5 uses
Coin-flip room size
389,226 kids
Even odds of a second one

Where Rhianon sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

Chance at least one other child shares the name

If the other children were drawn at random from the 2008 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 389,226 children born in 2008 and it's an even bet that one of them is another Rhianon. In a class of 30 the chance is Under 1%.

When Rhianons were born

Half of everyone ever recorded as Rhianon was born before 1988 — so the typical Rhianon is around 37 today.

Median birth year
1988
About 37 years old
Biggest decade
1980s
40.0% of all use
Born in the last 25 years
67.9%
A modern name
Recorded since 1950
355
People you could plausibly meet
Choose a decade

1980s — 40.0% of all recorded uses (142).

Is Rhianon rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
—
Not ranked then
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
0%
Peak was 1978 (25)
Years since peak
47
Years
Year-to-year steadiness
Volatile
41.4% average annual change
Best rank ever
#3,172
1978

Spellings of Rhianon

Rhianon is not the most common spelling — Rhiannon is, with 49.8% against Rhianon's 1.1%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Rhianon is used

Across 1910–2025, Rhianon was most concentrated in California — about 1 in — girls, against 1 in 3,202,555 across all states with data.

00 per 100,000

Most concentrated

  1. 1California1 in —

Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Rhianon has too little recent state data to map, so this covers all years from 1910.

Rhianon around the world

Where Rhianon ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2008
    #5,545
    in 2008
  • South Australia
    1948–2004
    #700
    in 2004

Popularity data from Office for National Statistics and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. CBS SA data under CC BY 4.0.

Rhianon by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#3,172
1978
Peak year
1978
25 that year
First recorded
1976
Last recorded
2008
All-time count
355
Count in 2025
Under 5

Names similar to Rhianon

Matched on shared beginnings and endings, similar length, and comparable popularity.

RhilynnRhiannonRhileyRhianneRhiannanRhiannaLynnonReannonRhileeRiannonKannonRhiannRhiaRhianaChannonRhilynRheannonKanonRhionnaManonBrannonRhianCannonRhiyan

Sibling names for Rhianon

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Rhianon

Top names of 1978, Rhianon's peak yearThe 1970s in fullOther names that peaked in 1978Girls' names starting with R