Riannon
Riannon was last recorded in 2006, when 7 babies were given it; 250 Americans have been recorded with it between 1977 and 2006 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Riannon by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Riannon?
Unranked in 2025
Its last girls’ rank on record is #14,791, in 2006; SSA lists a name only in years with 5 or more births.
14 babies in 1987, the peak
Riannon peaked in 1987, when 14 girls were given it, #5,537 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2006 | 7 | #14,791 | 3.7 |
| 2005 | 8 | #12,760 | 4.3 |
| 2004 | 5 | #18,202 | 2.7 |
| 2003 | 9 | #11,135 | 4.9 |
| 2002 | 9 | #10,895 | 5.0 |
| 2001 | 11 | #9,222 | 6.1 |
| 2000 | 14 | #7,488 | 7.7 |
| 1999 | 6 | #14,025 | 3.4 |
| 1998 | 9 | #9,912 | 5.1 |
| 1997 | 7 | #11,787 | 4.0 |
Every recorded year (28)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 1996 | 6 | #13,081 | 3.4 |
| 1995 | 9 | #9,368 | 5.1 |
| 1994 | 10 | #8,629 | 5.6 |
| 1993 | 10 | #8,540 | 5.5 |
| 1992 | 11 | #7,906 | 6.0 |
| 1991 | 9 | #9,161 | 4.8 |
| 1990 | 5 | #14,678 | 2.6 |
| 1989 | 6 | #11,964 | 3.3 |
| 1988 | 13 | #6,169 | 7.3 |
| 1987 | 14 | #5,537 | 8.1 |
| 1986 | 6 | #10,546 | 3.5 |
| 1985 | 10 | #6,825 | 5.8 |
| 1984 | 9 | #7,267 | 5.3 |
| 1982 | 13 | #5,455 | 7.7 |
| 1981 | 7 | #8,813 | 4.2 |
| 1979 | 8 | #7,852 | 5.0 |
| 1978 | 8 | #7,462 | 5.2 |
| 1977 | 11 | #5,793 | 7.2 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Riannon a boy’s or a girl’s name?
Riannon has been recorded only for girls: SSA lists no boys with the name in 28 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Riannon: the SSA national file counts each sex separately.
How many people are named Riannon, and how old are they?
An estimated 244 Americans named Riannon and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 34 years old and half are between 26 and 41. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 253 people named Riannon (250 women and girls, 3 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 245 born in the U.S. The Census count is 3% above that prediction.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
How common is the spelling Riannon?
Riannon is a less common spelling of Rhiannon: SSA has recorded 250 Riannon and 15,544 Rhiannon since 1880.
Of these 5 names spelled alike, given to 17,093 babies since 1880, Riannon is the fourth most given (1.5% of them). In 2025 none of their 210 babies recorded by SSA was a Riannon (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Riannon
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Riannon and names like it
- Compare Riannon and RhiannonBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1980sRiannon peaked in 1987.
- The top names of 1987The year the most babies were named Riannon.
- The names of the MillennialsMost people named Riannon alive today were born 1981-1996.
- Names starting with RMost given first.